BH or Real Labour?

36 Week's & 2 day's today, I have been having these symptoms off an on for a few weeks now but today for the past hr they are kicking my butt, my tummy tightens up really hard an I have cramp feeling in my pelvic area and it is hard to breath but it don't last long and they are not far apart it hurts to walk or move idk what to do. Any feedback would be greatly appreciated. Thank you.