Braxton Hicks

Is anybody else having painful Braxton Hicks in your back? Like from time to time I have tightening in my stomach which isn’t painful. Uncomfortable but not painful. And then about once a day I have painful ones. They aren’t at any constant rate just maybe one or two a day.. I’ve only had a couple in the past 2 weeks that took my breath away from pain.. this started at late 31 weeks. I’m 33 weeks today.