I have had stomach/lower intestine problems since I was a little kid, and the nausea after eating perfectly healthy food drives me nuts. If you have to a meeting, date etc. i sometimes just eat a salad with a little vinaigrette, or a banana or two...for me these are both generally inoffensive. I have noticed if I wait too long before eating this can make the nausea more likely to happen/worse. As far as being afraid of puking, I have no fear! It actually in my case seems to be a necessity... I can't seem to shake the nausea without puking. Alas, the best nausea cure for me (obviously depending on the situation) is a little joint of medical cannabis. (It is not as hard to get a prescription as one would think).