Doyle, Presiding Judge.This appeal arises from an allegation of medical malpractice made by Dawn Siska against Dr. John McNeil, Jr., and Northside Anesthesia Consultants (“the defendants”). Siska originally filed a pro se complaint but subsequently retained counsel; in the meantime, the defendants moved to dismiss, arguing that Siska failed to file the necessary expert affidavit with her complaint. Although Siska filed an amended complaint, the trial court granted the motion to dismiss, and this appeal followed.[1] Siska argues on appeal that the trial court erred by granting the motion to dismiss because (1) OCGA § 9-11-9.1 (b) is unconstitutional, and (2) she timely amended her complaint to comply with OCGA § 9-11-9.1 (b). For the reasons that follow, we reverse.The record shows that Siska filed her pro se complaint on December 29, 2016, which was the last day to file a medical malpractice action based on the events at issue, which she alleged occurred on December 29, 2014.[2] It is undisputed that Siska failed to attach an expert affidavit to her first complaint, and she did not attach an affidavit pursuant to OCGA § 9-11-9.1 (b) stating that because of time constraints she could not prepare an expert affidavit and needed to invoke the 45 day extension. On February 6, 2017, counsel for Siska filed an entry of appearance and his own affidavit, averring that Siska retained him on January 25, 2017, that “she filed the [c]omplaint pro se on December 29, 201[6], just prior to the Statute of Limitation[],” that she was unaware of the “immediate need for filing an expert witness affidavit simultaneously with the [c]omplaint,” and that the attorney had located an expert to review the file. On February 7, 2017, the defendants filed an answer and motion to dismiss the complaint for failure to file an expert affidavit. On February 9, 2017, within 45 days of the filing of the complaint, counsel for Siska filed an amended complaint with an expert affidavit attached. On February 20, 2017, Siska filed a response to the defendants’ motion to dismiss, which had been filed in between the filing of her attorney’s affidavit and the amended complaint.[3] This response detailed why the extension in OCGA 9-11-9.1 (b) should apply. The trial court held a hearing on the motion to dismiss on May 18, 2017. On May 19, 2017, Siska filed a second amended complaint in which she alleged that (1) the expert affidavit was not filed with the complaint because she was proceeding pro se, the failure to include the affidavit was based on good faith as required by OCGA § 9-11-9.1 (b), and the second amended complaint was filed to satisfy the requirements of that section.After a hearing, a transcript of which does not appear in the record on appeal, the trial court entered an order dismissing the complaint. “A motion to dismiss based upon the lack of an expert affidavit is a motion to dismiss for failure to state a claim under OCGA § 91112 (b) (6). On appeal, this Court reviews the denial of a motion to dismiss de novo[, construing] the pleadings in the light most favorable to the plaintiff with any doubts resolved in her favor.“[4]1. As explained in the Supreme Court’s transfer order to this Court, Siska failed to raise and obtain a ruling on the constitutional issues in the trial court. Accordingly, the arguments raised in her first and second enumerations of error present nothing for this Court to review.[5]2. Siska also argues that the trial court erred by granting the motion to dismiss because her pro-se complaint was filed within 10 days of the expiration of the statute of limitation, which in conjunction with the filing of her amended and second amended complaints, including her expert affidavit filed within 45 days of the complaint, her affidavit, and her attorneys affidavit, triggered application of the 45-day grace period for filing an expert affidavit under OCGA § 9-11-9.1 (b). Pursuant to OCGA § 9-11-9.1 (a), along with any professional malpractice complaint, a plaintiff must contemporaneously file an expert affidavit supporting her claim or claims.[6] Under OCGA § 9-11-9.1 (b), however, a plaintiff has a 45-day grace period in which to file an expert affidavit if (1) the complaint is filed within 10 days of the expiration of the statute of limitation; and (2) the plaintiff’s attorney files an affidavit stating that an expert affidavit was not filed contemporaneously with the complaint because the plaintiff retained the attorney fewer than 90 days prior to the expiration of the limitation period. It is undisputed that plaintiff filed her cause of action within ten days of the expiration of the applicable statute of limitation for her claim, and therefore, she would clearly be entitled to invoke the protections of OCGA § 9119.1 (b) if she had made the proper allegations in her complaint when it was first filed. OCGA § 9118 (f) requires that “all pleadings be so construed as to do substantial justice.” This Court has repeatedly held that the spirit and intent of the Civil Practice Act require that pleadings are to be liberally construed in favor of the pleader. Pro se pleadings are held to less stringent standards than pleadings that are drafted by lawyers. As our Supreme Court noted in Saint Joseph’s Hosp. v. Nease,[7] the language of OCGA § 9119.1 (b) shows a clear legislative intent to give a plaintiff extra time to secure an affidavit when the statute of limitation is about to expire.[8]