TMI!! Gas pains and period cramps

Seryna

This is gonna be some TMI stuff but I'm a first time mom and I'm going to be 39 weeks on Saturday. I've been having what feels like gas pains and period cramps at the same time, my stomach also get super tight. I'm now currently sitting on the toilet trying to poop but nothing is coming out, I'm just letting out really angry gas. What is going on?!? Are these actually contractions with some gas pains, or is this something normal? Please help!