Braxton Hicks

Background: 286lbs. 18+3, and already have a son who is 8 months.

I've had some horrible Braxton hicks this pregnancy, and it has me very concerned. I haven't taken my prenatals as I should I take them here or there I'm disappointed in myself for that, because I was on it with my son. But I went to the Dr Thursday she checked said cervix is fine, to let her know if they get worse. She isn't concerned at all. But I am, I am terrified it's gonna cause a preterm labor. I stay moving obviously with my son ha ha, hydrated, and well fed healthy small snacks too. HAS ANYONE EXPERIENCED THIS BEFORE?? Any ways to keep them at bay? Doing more or less of something??

I'm just extremely concerned for myself and baby.