I was at work today, my 3rd 12-hour shift in a row, and I haven't had much water to drink the past 3 days. I was walking down the hall from my patient's room and noticed what felt like a painless cramp deep in my pelvis. Felt just like a Braxton-hicks contraction, but my uterus is so small I can't even feel it from the outside yet! Scared the crap out of me. Still no pain and no bleeding, but I'm for sure taking time to hydrate during future shifts.