I've had pain all day in my lower belly that feels like I did a lot of sit ups. The pain starts maybe two centimeters beneath my belly button and radiates all around the bottom of my stomach.  I don't think it's contractions because the pain never stops and restarts. It's constant and has been all day. Also, I've been terribly gassy all day. I haven't noticed any change in discharge, and my water hasn't broken. I'm due February 27. Should I call the doctor?