Ovulation?

Jessica
So I took my BC until the pack was empty. (I never take the pills the week when I'm on my period) I had my period like normal from 1/6-1/9. Nothing the week after and this week would be my tenative first "fertile window". I didn't buy an ovulation test as I figured I probably wouldn't be yet since I just got off the pill. Last night I had bad cramping on my lower left abdomen and it lasted all evening. Even today I am having some cramping but not as bad. Is it possible that I am already ovulating even though I've only been off the pill for a few weeks?!? My CM and position would indicate I'm "fertile" but that doesn't necessarily mean ovulation. Any help would be appreciated! This is my first time TTC so I'm new to all this :)