Hang in there Stitch. I have health anxiety too. However, in your case, I would be feeling pretty good. You have been adviced by multiple professionals that in their experience it is most likely nothing and the dentist is just being cautious. Keep reminding yourself of that. In my experience (I am 54 and have had cancer 3 times) Drs are honest and will tell you when they are concerned and when they are being cautious. In every instance for myself this has been true. Keep repeating to yourself that your dentist and oral surgeon don't think it is anything serious. Again, I can struggle myself at times because of my history, but when a Dr. tells me it is most likely nothing, I keep reminding myself of that over and over.
Another thing to keep in mind is that in todays world, Drs really do have to be extrememly cautious over every little thing, so they don't get sued. In my case, I've even been told that 10-20 years ago, things that they may have just waited another 6 months to recheck, they just go ahead and remove it and send if off to be tested. So much more proactive nowadays instead of waiting and watching.
Sorry that you are going through this......