Sorry vikingdoc, my screenname is old. I was a vet, but now also specialize in the human primates. I think what they have said about the colonoscopy is that the biopsy is benign (was it a polyp) or an erosion. Ascerated could mean "macerated". By any mean, it likely meant that the colonscopy did not help them make a dianosis for you. It sounded like the EGD did not find much either, but they did a culture to see if you harbor bacteria that can cause duedenal ulcer. In which case, they will treat you with combination antibiotics to eradicate.
The symptoms sounds concerning. They might have to do more test such as a barium swallow with a small bowel follow through, or one of the fancy capsule that you swallow that images the small bowel as it pass through.
I would leave a message with your docs office, and ask if its ok to dive. Most likely, he'll relay the message to you that you can.
Tumors of the small intestines are hard to diagnose, and so is chron's disease. It sounds like you might get more fancy tests done in the near future.