Oiii sayang, 15 days in and still having that pain and soreness at the stitches is quite common, the healing takes a bit of time lah, but since you're still feeling ngilu like that, best to check with your gynae or clinic just to be sure there's no infection or anything, okay? A few of us mummies had similar issues and the doctor just gave us some extra care tips or cream to help it heal faster, so don't worry lah, very manageable once you get checked!