Hi there and welcome... Try not to worry too much. It is great that you've had it taken care of (or will) and likely it's not oral C. Though just because your dr hasn't seen it doesn't mean it can't happen. Occult cancers do happen there are a few people here who have had no known primary but did find It in their lymph nodes. Sometimes the body manages to resolve the primary tumor - it is rare though. my tumor wasn't visually apparent until it became very large - mostly it was just reddened skin and was biopsied as such. (inflamed tissue) it was actually inside my tongue and only became an open sore after a second biopsy. I too have no precursors for this disease - I'm even a veg head - and have never done drugs so don't kick yourself for the MJ thing - this can happen to anyone. To me though it doesn't sound like OC - good luck! Hope you're just passing through!