are you keeping him hydrated? Make sure hes drinking water. And if you have any mushy foods try to offer him that as well, if worst comes to worst, just make him comfortable, I'm sorry that sounds horrible but it may come down to it.
vet care is needed ASAP, you may find yourself up all night with him. Even if you can't get him to eat applesauce, just give him water... you can just put it on the tip of your finger and rub it over his mouth, that or if you have a syringe that could work well to! Do you have a hot water bottle?! Or a magic bag or whatever you call it? one of those fabric things filled with rice? if so put it in the microwave and let him lie on it. I did this when i had baby raccoons.