Update: I finally got to talk to the vet, but he really is not sure what was wrong. He gave me some vitamin solution to help stimulate his appetite, but I didn't need to use it because he ate a cricket all on his own! He is looking and acting a lot better. No more bubbles or continual swallowing. I'm am so happy! I'm not sure what was up with him before, but he seems to be on the road to recovery now! Let's hope he continues to get better. I'll keep you all updated. Thank you all so much for your help! I really appreciate it!