I've been dismissing this for ages but it's driving me mad. I'm 37 weeks pregnant now but this has been going on for well over a year/15 months. I wake up in the early hours and my stomach is cramping and burning and feels really empty. It has me literally tossing and turning until I'm sick a few hours later. The sick is yellow and very acidic. A few hours later I feel better although really wiped out. It happens usually at least once a month but sometimes more often. Any ideas on what it could be? I keep meaning to go to the doctors but forget. TIA