Please help me out here... I'm kinda worried right now... I was laying on my side cuddling with the…

Please help me out here... I'm kinda worried right now... I was laying on my side cuddling with the bf and I tried to sit up cause I felt nauseous and as I got up, I got a very sharp pain down my tummy from under my rib cage all the way down to my pelvic bone. It made me cry a little and now my whole tummy is kinda firm and it hurts all over. It's a constant pain... I've drank water been laying still. Walked around, went pee and it's still not gone. It's been 20 mins and I don't know if I should be worried. Pls help