When I have 1-2 sips of beer or wine, I get nausia and feel sick for a day or two, almost staightaway... Could it be liver or stomach?

Yes. You just might not have the physiologic tolerance for alcohol. But to be safe, it's always a good idea to talk w/your family doc and get checked out. Blood work to assess your liver is easy & inexpensive. If your stomach doesn't bother you any other time, i wouldn't worry too much about h pylori. But if you're nauseated all the time, you need to get checked out more thoroughly.