Girls good night! I gave birth on the 16th with a small tear inside. The…

Girls good night! I gave birth on the 16th with a small tear inside. The doctor stitched it up and said they'd dissolve themselves, so you can sit down. Yesterday the stitch came off. Since giving birth five days have passed. Today my stitches started hurting, it's uncomfortable sitting and standing. The stitch is internal but closer to the edge of the exit, who did this and what did they do? How quickly do these stitches dissolve, anyone tell me ??