Consistent Braxton Hicks

31 weeks and all evening I have been having pretty consistent Braxton Hicks, their definitely not painful but very very uncomfortable and have been going on for a few hours now. I’ve rested and drank water but it hasn’t seemed to slow them down. Everything I’ve read is that you don’t dilate with them so it’s not a big issue, but if I’m getting this many over so many hours should I start to be concerned? Has anyone had issues before with Braxton Hicks becoming preterm labor?

Update: this is what I have timed so far, even with changing positions they will hit standing or sitting.