Sayang, perut berdenyut dan bergerak banyak macam tu memang boleh jadi normal dalam pregnancy, tapi because it's combined dengan sakit, you really need to check with your doctor atau midwife ASAP, jangan tunggu, okay? Especially since you still have a few months to go. Boleh jadi baby movement, boleh jadi Braxton Hicks, or boleh ada other things yang kena check, so better safe than sorry lah. A few of us mommies went through similar things, but doctor check je yang boleh confirm what's actually happening. Jaga yourself and baby, and don't hesitate to go to clinic or hospital if sakit tu teruk or ada bleeding, okay?