BP wheezing

Hello all, just some quick questions and maybe some suggestions on what I should do. I had my ball python out earlier today after I had been gone for about 5 days and he was wheezing (light hissing sound). Here are his cage stats:

Ambient cold side 75-80
Ambient warmside 85-90
Ground temp: 87-90 degrees (UTH regulated by T-stat)
Humidity 45%-55% (according to my gauge it had gotten down to 40% on the last night I was gone)
Related info: He has been off of feed for the last month. I came home last night and he took two f/t 13g adult mice. I was very happy that he finally ate. He has not lost weight. His estimated age is 7 months old and 206g, he looks very healthy. He is also past due for shedding. Last shed was about 8 weeks ago. This could be due to him not eating though. I had him out today and I heard what sounded like wheezing. He has no drainage, he is very active in and out of his cage and is otherwise not showing any signs of an RI.

So, all is normal except for the wheezing. I pulled down his lower jaw slightly and did not notice any excessive mucus, bubbles or anything else out of the ordinary. He is very well taken care of, I work very hard to closely monitor his temps and humidity. What gives? Any suggestions would be greatly appreciated!

I would wait it out another day or two to see if anything changes.

Is he wheezing constantly, or only when you hold him?

Even when you hold him, is the wheezing constant?

The wheezing doesn't seem constant and it isn't extremely loud. There isn't any crackling or whistling going on either. His demeanor is the same, if anything else he is more active, which has me really puzzled as to what is going on. My natural reaction is to take him to the vet but I will give him a few days as per the suggestions and what I found browsing the web. He could have went blue when I was gone and he maybe getting ready to shed, which might explain this. He seemed to not see his feed very well last night while I was doing the zombie dance with the f/t last night. I soaked him tonight, I will see what the next few days bring. Keep the suggestions coming please.