Help me please... I'm begging you

Every once in a while for years now I would randomly out of no where get this pain. 
This pain would feel like a sharp stab like a knife in my lower abdomen right in the center. I thought it was a cramp but it can't be. It's not the same. It's incredibly sharp and hurts so much it causes me to gasp slightly and lean forward a little. 
Well, today it happened 4 times. Tonight I felt bloated and when I sat down on my bed it shot a pain in the same place. 
It's really bothering me that today it happened so much. 
Does anyone know what this could be?
Unprotected sex 5 days(pull out) ago fertile peak ended 6 days ago.
On my first month of birth control.