Unfortunately, as many of the other commenters have said, your mom is in denial. It is hard for parents to admit that they were not able to protect their children from all the evil in the world, that somehow their baby has experienced significant pain and has had to endure a horrible illness.

When I "came out" as bipolar to my parents a few weeks ago, they insisted that I see another psychiatrist to get a third opinion. They wondered whether my diet and sleep schedule might be responsible for all of my symptoms. They told me that they don't want me on meds, but "if you really need them, then okay". As I am very nonconfrontational and tend to overestimate how much crap I should endure, it may take me a while to convince myself that I need the meds if they have to know that I'm taking them... Really, though, I was lucky. I am sure some people's parents question whether they have symptoms at all.

It is really hard to take care of yourself when some of the most important people, on some level, don't believe that you need the care. But you do! And you deserve to get help for your illness, because regardless of what anyone might believe about you, you KNOW that you have been in pain. It may be hard for you to admit that you deserve to be happy, especially when others are under the illusion that you already are. However, you do deserve to be happy. You deserve to live up to your full potential. This is not a selfish goal; when you feel well enough to fully participate in life, you will naturally do things that inspire and help others. Take care. And get (or continue to get) care for your illness, regardless of what your mom thinks.