Re: ? about stomach cancers and such
When i was getting all my acid reflex tests done, i asked a lot about ulcers because that's what i thought I had. My doc told me that 80% of ulcers are caused by H pylori bacteria, did you take antibiotics when you had the ulcer last time? If not, or if the doc didn't prescribe an effectice one, it's very possible for them to return, and that H pylori bacteria and ulcers are associated with stomach cancer (I don't think they know yet whether it's cause and effect or the same conditions that lead to ulcers are similar to the changes that occur for stomach cancer).
If it's colon cancer you are also concerned about, i know it's not fun but those colonoscopies are life savers, if you've got a family history, it might be worth checking with your doc about when to get the first one done. (The good thing is that once you have it done, it's years before you need another!)