4 months after delivery, still having pain in vagina

So, after I had Christian I'd get occasional sharp pains on the back wall of my vagina, up near the cervix, on my right side. I figured it was probably from stitches or something in there... or just things being sore... but he's over 4 months old now.... shouldn't that have stopped? Its not constant... but its daily. Its a sharp stabbing pain. Any ideas on this?