A UTH unregulated can get well over 100F and quickly. That's a dangerous situation for your snake. Regulated means Thermostat Regulated/Controlled, not you turning things on and off.
Get a thermostat for it ASAP and unplug it in the meantime. All heating elements must be controlled by a thermostat.
Burning or worse, killing, your snake will be much worse than getting an inexpensive thermostat. You can upgrade to a better one down the line, but get something for now. If you are not sure what to get, ask, and we will point you in the right direction.
While the UTH is unplugged, do not feed. If he's going into shed, you should hold off food anyway as that can impact the shed negatively.
Temps too hot or too cold will make it difficult for your snake to digest. Too hot he will have to choose between trying to digest and potentially getting burned or avoid it and risk regurgitation.
It seems you want what's best for him, and no one here is trying to give you a hard time. However, please do what's best and listen to those who have lots of experience.
Also, many snakes get pink belly's when going into shed. If his eyes are cloudy, that does sound like what's happening.