First, you have to answer some questions:
1. You had oral sex?
2. Are you smoking?
3. Drinking alcohol?
You seems to have hpv, but usually if it cause something like tumor is not that type of hpv who can make you cancer!
Hpv who make cancer is silent, this do not make warts or other stuff.
You said: "as well as I have dry mouth and my tongue burns sometimes", this is sign of candida and also sign of Herpes type 1.
Just try to eat very healthy, rest a lot, DO NOT SMOKE/ DRINK AlCOHOL, wait 1-2 monthst and see how it is.
Also drink Aloe Vera gel and take garlic daily.
"Does this my immune system is comprimised?" - No it is not, only people with hiv have a immune syst compromised.
If doctor checked you and said is no cancer,than he knows better, you dont have to worry,you are not the only one who is scared from unknown.