I've had a random thing that for the past 4 or 5 months, every 3/4 weeks I wake up after about 4 hours sleep feeling really uncomfortable in the tummy. Kind of bloated. I go to the loo and sit there hoping that that will relieve it, but it doesn't. After about half an hour I feel sick (I'm not a sick type person and haven't felt sick up until this point), vomit and then can go back to sleep. I wake the next morning tired but otherwise fine.
I'm thinking that maybe I need to keep a diary with what I am eating. When i go to bed I am completely fine, and when I wake in the morning I am fine.
I am otherwise healthy.
What could it be? Anyone?