I have had what I thought was severe acid reflux the past two days, but I'm concerned. I have severe pain high in my stomach below my breast bone. It gets worse if I lay down, and I have been throwing up a couple times at night (it wakes me up). I have had problems with acid reflux in the past, but it has been under control. When this began two nights ago I also woke up with diarrhea, making me think I had food poisoning. The diarrhea has subsided, but the pain has not. I have taken Tums, Pepcid and now Rantidine to little affect.