I am attributing my waking up in the middle of the night with a knot like feeling in my upper stomach with a slight feeling of nausea. This doesn't happen every night - but has been happening more frequently lately. Going over my meds I am only taking calcium and magnesium and Im trying to get to the bottom of this. I have been very faithful to a diet of bland boring foods so I dont think it's anything I've been ingesting. I take 75 mg of zantac before bed and 2.5 mg of valium. Wondering why this is happening? Does this sound like an ulcer problem? Last year I was tested for H Pylori and the test came back negative. Is there any help out there in cyber space?