So I'm not sure what contractions are suppose to feel like.. This is my first baby and I'm 35 weeks pregnant, Everyone just says I'll know when I'm having contractions.This morning I started having these tightening pains in my vagina.. Almost like someone is pinching me down there only from the inside. They don't hurt just a little intense at times and they pass quickly.. Like 10 to 15 seconds.. I have them at least 4times an hour.. Usually right after one of them I'll feel my baby move just a little higher up.. Are these Braxton hicks or could it just be baby sitting on a nerve or hiccups?