Cramps? Contractions?

Alexis
I'm 37 weeks exactly with twins. For the past hour I've been getting period like cramps in my lower stomach. I've drank water and laid on my left side nothing seems to help. I've gotten these before and went to l&d and they said I was getting contractions. Could this be the same thing? I'm a FTM and a lot of people I know tell me I'll know when I'm getting contractions but this pain is constant. Just doesn't go away or fade away.