Please..don't beat yourself up over something that you had no knowledge of from a risk standpoint. It's counter-productive, you can't change what (if anything) has aready happened, and you'll drive yourself to the laugh-factory fretting about things like that.

When you talk about removing your tonsils to reduce the "threat" keep in mind that to do so would require you to undergo general anaesthetic and a surgical procedure. That in itself is FAR more dangerous, in an immediate sense, than the possibility of your having contracted something from someone in your past.

Your ENT is not likely going to remove anything without good reason and just cause; the risks outweigh the potential benefits.

Relax. It isn't cancer yet. If, God forbid, you are diagnosed with a cancer, you'll have enough on your mind to worry about, without worrying this much in advance.
Wayne