Sometimes when someone gets hurt they might push people they care about away because they don't know how to be in a dependent role, or don't like having to, and they might feel guilt about the role reversal. She has been the one who took care of you, and it might be hard to take that she is the one who needs help now. It sounds like there is a lot of free-floating anger too, that probably neither one of you knows quite what to do with. Maybe it would help if both of you can identify what it is that you are really angry about, and express those feelings, making it clear that you both own your own feelings and don't blame each other.