am unsure of the other person's HIV status, but I have reason to believe they might be bisexual. We were deep kissing, and I had a large canker sore on the inside of my lip from accidentally biting it. A month later, another canker sore came up with no known cause.i usually get them from biting my lip or cheek, but this one I did not bite. It appeared out of no where. Is it possible to contract HIV from this situation- kissing with a canker sore? Should I get tested? Is the canker sore that just came up a symptom of HIV?