Braxton Hicks?

I’m currently 38 weeks 4 days. Just only yesterday, started to deal with menstrual-like cramps almost 3-4 times in an hour lasting abt 10-15secs. Therefore, im curious if this is braxton hicks? If so, for those who’s experienced it before, do u hv back pains each time the cramping comes? Do i need to go to the hospital already?