Ovulating or..? Something else

Allison
I've had left lower pain for two days now, and i don't know if I'm ovulating or... Yeah. Please help. I don't think it's pregnancy for I only had sex twice this month but one was before my fertile window and the other was the day I started my fertile window.... But I haven't shown pregnancy symptoms. My period comes at the end of the month. Usually I can tell I'm ovulating.