Back pain that feels like diarrhea early second trimester

I got off the phone with my mom and she said it is normal to have back pain. Labor pain is all over tightening mainly in the front and upper abdomen. I of course googled and it’s one of the first signs of premature labor is lower back pain that feels like diarrhea. I know if I call the on call they’ll hear how many weeks I am, the fact that I carry my full term last time and tell me if the problem persist call tomorrow. I am nervous I am having a ton of anxiety this time. Er is not the place I want to sit in right now. I need to be calm, please calm me.