sorta repost... more information

I started my period on the 1st. It was normal as always and it ended on like the 4th or 5th. The day I stopped bleeding, my DH and I had sex. I'd say about 2 days after that, I've had light pink spotting when I wipe & cramping...(normally when I cramp from my period, its my left leg instead of the...bladder area..) and its still going on...
My son is 14 months old. Had him via C section. Tubes tide right after.
Any ideas on wtf is going on? I don't have insurance right now so i've been putting it off to see if it goes away but it hasn't. Has anyone else had this? anyone know wtf is going on?