I don't know how close you are with your mother generally, but my mom, whom I am very close to, will say things that can be hurtful in her attempts to be supportive.
your mother may think that by telling you to stay out of the hospital that she is actually telling you to try to be healthier in some weird way -
When they don't have the illness, and don't understand it that much, their ignorance shows in how they deal with it.

There are times when i am doing really badly, talk to my mom, tell her i'm doing bad and she ignores it...like she doesn't want to know, or by ignoring it, it will go away.

i love my mom, but my friends are way better support for me during the bad times. What i've learned is that she won't change, so I can't expect anything different from her.
it sounds like you know your mom is negative about this stuff anyway, so lean on the people you know are really there for you and understand what's going on with you. Only you truly know how you feel. don't worry about what she says...she doesn't seem to get it so what she says doesn't really count.