I just got my cage from DIYCAGES.COM and it's the 24"x24"x48" and I'm going to assemble it later on tonight. I'm excited ha ha.
The vet said it's just a common case of mouth rot or a mouth infection. The antibiotics are really helping and his swelling and scabs are going away more and more everyday.
As for his lethargic behavior... I asked around and someone said that it could be the antibiotics but he could also be dehydrated. I thought to myself about how I haven't sprayed him in a while because he had been using his drip system and the humidity was, what I thought to be, high enough. Well after people started telling me that I had the humidity way too low I decided to get some warm water in his mister. I sprayed him and his surroundings for about 5 to 10 minutes and he came back to life like he had always been... After sleeping for a whole week straight all he needed was to be sprayed ha ha. I felt like such a bad lizard dad ha ha. But I've been spraying him a lot and he loves it. Also, with his new cage I will buying a hibiscus for his cage and that along with his dripper and sprayings he should have a great huge humid home.
Again, thanks everyone for all of your insight and help! It means a lot to me and even more for Cayman ha ha. Thanks again!