I'm probably speaking out of turn here but sounds like your mom isn't really hearing you. Only you know how you really feel and how the anxiety is causing problems for you. Don't discount how you feel just because there are others who say "this or that" will solve your problem. It may solve their problems but they're not you. If you believe the anxiety is much more than passing anxiety like before taking school exams, then please seek professional help.

Anxiety at its worst can cause extreme distress. I cope with it, and it's a living hell each day.

I hope for your sake your mother will take the time to become more informed about anxiety disorders and realize you're reaching out and be supportive with whatever course you decide to take. It's your life you have to live, and I hope with the proper help you'll live it very well. Take gentle care of you.