Constant abdomen pain

Danielle • Dated my husband since December 2006 and we were married May 2016. Baby boy Henry born June 2nd 2017 👶🏼💙
Is anybody else experiencing constant pelvic crampiness and on and off Braxton hicks contractions (super uncomfortable but not super painful)? I am almost 38 weeks pregnant and it just hurts to sit in a chair. I've already had 3 large cups of water the 2.5 hours I have been at work and changed positions and it isn't letting up.