I understand where you are coming from. I have had to call the police and have my mother removed from my house. Perhaps an order of protection would not be a bad thing, because for some reason, people who are stalking you like this sometimes respond respectfully toward law enforcement telling them to go away.
I bet that when you interact with your mother, you immediately start making noise like you did as a frustrated teenager, fighting with her and yelling at her and forbidding her to come around you. That's her pay off. She knows exactly how to push those buttons. But forget your childish fantasies about having her committed. As others have pointed out to you, in earlier times, you'd have been the one in the mental hospital, she's have been visiting you every day to make sure you were driven even crazier!
But the key is, by my calculations, you're over twenty one. With or without a restraining order, you do not have to associate with anyone you don't want to associate with. You do not answer her calls. You leave if she comes where you are, as in your brother's house or something. You cannot fight with your mother long enough or tell her clearly enough to make her go away and stop contacting you. You need to end the pay off or reinforcement that she's getting from this behavior. It can't be full time if she lives in one state and you live in another.
Continue with your counseling. You're going to have to be the adult in this situation. When you begin to feel sorry for your mother instead of feeling sorry for yourself for having to go through all this, for not having a normal mother like everyone else has, and for the trouble you have making everyone believe you have a crazy mother, you'll be on your way to recovery and a successful adult life, in spite of her and her constant efforts to control. That's what all this contact is, it's control issues. Oh yes I will come around and call you and see you whenever I want to!
Be extremely careful. Sometimes this ramps up to the old "I brought you into this world, I can take you out of it!" scenario. Don't leave your doors unlocked. Keep those privacy settings high. By the way, be very very sure you do not eat any of the witches' candy. DO NOT take any money or offers of help of any kind from her. And do not become physically violent with her, no matter how she is provoking you. She'd like nothing better than to have YOU put in jail for assaulting a helpless little ol' lady, just because she visited you in your dorm room or apartment. We cannot say this often enough. Continue with your personal counseling.