I know this might sound a bit odd, but sometimes all the labels we get for our conditions are just that - labels. Really they are a tool to help the professionals and they don't have very much to do with the real person underneath.
By that I don't mean that you don't have problems, I just mean that every time the doc or therapist or whoever comes up with another condition to add to your list it doesn't necessarily mean it is something new or you're getting worse, it was probably there all along just they hadn't noticed it before.
Once someone says you have something then you will start noticing it more and more yourself, of course you will and of course that makes you feel so overwhelmed.
If you can, try to ask your doc or therapist, "So what are we going to do about that?" when they come up with something new to add to the mix. If you need your Mom to ask that question for you then that's ok.
There are lots of people in the world who feel insecure and less than perfect and who would be glad of a friend who is a bit different too. Like Yoda, I think volunteering at an animal shelter or somewhere like that would be a real help to your confidence