PP pinching/stabbing in cervix

I am a little over 4 weeks postpartum and during the delivery I tore and had a few stitches. From what I can tell they dissolved pretty quickly because I haven't felt them in two weeks or so. At random times when I'm sitting, I'll feel a sharp pinching/stabbing feeling inside my cervix. At first I thought it might have been from the stitches but since they're gone, what else could it be? Anyone else experience this before?