Damn, that's really terrible- to be sexually abused in hospitals of all places. What kind of demons would pick on the ill?
You deserve your shot at happiness, and you shouldn't let these awful people be the ones to drive you to death- to take that chance away from you. If your mother is trying to kill you, cut her out of your life. When possible, move out. If you cannot live on your own yet due to lack of funds, try your best to endure it and save up for the time being. You'll get away from all the abuse someday, and you might find yourself living a life of happiness. If you have friends, you could consider being roommates with them and splitting the cost for rent.
It might help to hear your whole story though, it is hard to give good advice with so little to go off of.