I'm going to call my dr at 8 when they open but I thought I'd ask here to because I'm curious. I'm 22 weeks tomorrow. Just had my dr apt yesterday and HB was great. last might at 1am I got up to go to the bathroom and felt tightness in my lower abdomen and cramping on my right side. it only lasted about a minute but I feel sore from it whenever I lift my right leg or go to the bathroom I feel the ache in my right side below belly button near right hip area. I have a doppler and his HB sounds strong. What could this be?