I think i have an anxiety disorder, but I'm not sure, of course...But I don't know what to do. Help?

I always feel anxious. But nobody will listen/help me...I have good parents and and things I want, So my mom says I am lucky and thinks im fine and when I tell her that I think theres something wrong with me she says its just because I havent ate or I stayed up late with friends. I've told her I can't sleep but she doesnt think anythings wrong.
So, I looked up anxiety disorder and i have like all the symptoms. I just don't know what to do.
How do I tell her...?