BH question

Paige
So I'm 35 week...I started getting BH a few weeks ago. They don't hurt, my belly just gets tight and I kinda feel like a can't breathe. So I'm just laying down and felt this 3 times in the last 15 minutes. So question is even if they aren't hurting and feel the same as any other BH I've gotten, should I be concerned if I get more than 4 in an hour?