*update * I'm not pregnant... so could this be digestive issues??

So I'm at work and I'm a cashier and I do slot of standing and bending. Well I'm not on my period and I don't think I'm pregnant but I just started cramping horribly I want to cry. I feel like they are twisting and bending .... I just want to know if this is normal or not which I doubt it's normal... I just need help and someone who's a female to talk to....my fiance just can't relate lol