Im 37+weeks pregnant.. Been constipated the entire pregnancy until 30weeks were i would go 2-3 times a day with normal healthy stools. 4days ago i experienced painful bowel movements all day which eventually turned into the worst diarrhea ive had ever. The next day i was severly constipated and managed a tiny BM that was rock hard. Then yesterday i felt like i spent my whole entire day on the toilet with the runs to the point my bum was in entire burning pain AND now today i havnt had a single BM but ive had this constant urge to push one out - still no success. I have not changed my diet or eaten something different or limited my water intake.. what could possibly be happening??