I would calmly point out how it is very hard for you at the moment and how you would like him to help out by doing things for himself as you wont be able to anymore .....

Then leave him to it.

If he wants to sleep in a room that is a pigsty then he has that choice ! If he wants to go hungry then again he has that choice !

Nagging wont help anyone.

Backing off and leaving him to it will.