I'd recommend checking out if your school offers a counselling department... many colleges or universities have counselling services covered in the tuition and thus "free" for all students to use... it is worth looking in to I think.... I know it can be quite helpful and finding affordable therapy these days is nearly impossible.

Hang in there. I have a similar situation brewing with my older brother, who I've always been close with. He's 72, severe diabetic and other physical problems, and he's the sole caregiver to a toxic, clingy, mentally and physically ill wife. Honorable and loyal to a fault, he's caring for her when he is, himself, far too ill to be doing that. I am going to visit him next month, and I'm the only family member he's close enough to that I can point out that he's got to bite the bullet and get his wife someplace with full time nursing care before she literally kills him. Also, it might be nice for him to have a little peace and a bit of a personal life in the time left to him.

So I know what it's like to be juggling other stuff (in my case, work, my own marriage, and my autistic adult stepson who lives with us) and at the same time deeply concerned for a family member going through a rough patch.

Wish I had a brilliant suggestion beyond what you're doing -- recognize that you have needs too, and acknowledge it to yourself.

Sadly my brother will probably go down with the ship. It's his way. It is hard to see life break him like this, but at the end of the day it's his life and I have to respect his decisions.

Best of luck with your mother, I suspect the final outcome will likely at least be better there.

Keep calm and carry on. Look after your mum and you will both get through this. Look to a bright future for her and yourself.
From this horror you will become stronger.

I hope your mom is able to get a quiet she deserves, and you need to rest also.

Sounds like you need some R&R. Have you thought about superglueing his penis to his body?

Sounds like you are both care giver and moral support for you mom.
That can physically, emotionally, and mentally exhaust a person.
You need people to support you too, so you don't let yourself get too drained.
I applaud you going through grad school, while helping your mother out of a demeaning relationship.