i am not quite an 'expert' on this yet, but i do know that it happens to my husband almost 4 nights a week. that is until he started flushing. he would wake up most mornings with a terrible migraine like headache and by noon (after a hellish morning) would be throwing up bile. as far as what you can do, we ourselves are still working on that one. hope i at least answered part of your question.
jen