35 weeks.. BH or Early Labor Symptoms?

Hannah
this is my 2nd child.. with my first i never experienced Braxton Hicks or anything. I had preeclampsia and toxemia but that was it. 
i'm 35 weeks 3 days now and for the last almost two hours i've been cramping really bad and i'm really nauseous.. i've read that it could be the start of labor that progresses over the next couple of days, but has anyone else experienced this and it end up just being false labor? 
also, she is breech and estimated over 6.5 lbs right now, idk if that makes a difference 🤷🏻‍♀️