My camera was WAAAYY too blurry for you to see anything. I'll try to google some pics of what it looks similar to. And I think he does have RI.. I checked his mouth once more and I saw strands of mucus (like 2 or 3) right when I open the mouth.. So, I think that means he's positive for RI..
Also.. when I tried opening his mouth.. he kept jerking back so maybe it was hurting him (and I've done it this way with opening mouths for snakes for a while so I know how to do it and I haven't done it wrong once) for me to put the middle of the Q-tip in his mouth. I was putting it at the front of the mouth (where I saw dark brownish stuff and a little swelling) so maybe the mouth rot was hurting him as I was pressing against him with the middle of the Q-tip.