I'm 35 weeks pregnant with my first and currently experiencing terrible menstrual like cramps in my lower abdomen. It started the other day at work so I thought it was just me running around too much and once I sat down and relaxed they subsided. Just now while getting something to eat I got some of the worst ones yet and again once I sit down I feel better. My stomach gets very tight and I have to stop whatever I'm doing. I can't tell if they are contractions or just the baby sitting weird. I know her head is down.. I've had a perfect pregnancy so far and it just worries me if she comes 5 weeks early! what could these pains be? Should I call my mid wife? Also I have no spotting or low back pain.