Don't take him to the same vet, that will get you nowhere, and not get Weebs the help he needs. I would start researching vets now-first thing tomorrow. Find a vet that has not just reptile experience, but experience with chams specifically. Once you find one at the least call them and ask to speak to the Dr. even ask that he/she call you back if need be. Explain what is going on, how long it has been, and what the previous vet told you to do, and see what they say. Most likely they will tell you that he needs to go in ASAP for treatment.