Eh, ini memang biasa dekat few weeks before labour lah, badan kau tengah prepare, so cramps and changes dalam bathroom habits is normal! But since dah 2 hari macam ni and you're getting that sensation terus-terus, better check with your doctor or midwife just to make sure everything okay and they can confirm if this is pre-labour stuff or something else, sebab at 36w++ we need to be sure. Dekat check-up nanti, mention this to them and they'll put your mind at ease!