Abdominal Muscle Pains - AF.

Ciara
Hi all, 
The last two days, I have had very strong pains in my stomach. Not cramp like, but it feels like my abdominal muscles are being ripped out of my stomach. I'm on my period, which is lighter than it's ever been and I am confused as to what these pains could be? Of course, when I google it says I'm pregnant! Lol! Any help would be appreciated!