Period cramp daily but inconsistent timing @ 39 weeks

Im currently 39 + 1 weeks but since 38 weeks ive been having moderate period cramp and lower back pain every day. Last about a few mins. But its at an inconsistent timing. Sometimes only once during that day, sometimes in the morning and at night. Sometimes only in the morning. And my stomach will tighten whenever i feel it. Sometimes the feeling wanting to poop but no poop come out. But last check at 38/4 i have yet to dilate. Is it still braxton hicks ? Or might be early contraction but nothing to be done since its inconsistent. #FTM