This has been happening for a while now, but I cannot find any information anywhere and my therapist just recommends I get expensive testing done that I can't afford. 

Whenever I'm feeling anxious (about to speak in front of a group, walking into an unfamiliar building, meeting someone new), I follow common advice and try to relax my muscles and breathe. But, when I do this, my heart rate skyrockets, and I feel very very nauseous. I don't know if this problem is mental anymore. Even if my thoughts are not consumed by anxiety my body will react as if there are. Anytime I tense my stomach muscles for more than a few seconds I feel very uneasy, and the feeling is amplified whenever I'm in an anxiety-provoking situation.

Whenever I'm feeling anxious (about to speak in front of a group, walking into an unfamiliar building, meeting someone new), I follow common advice and try to relax my muscles and breathe. But, when I do this, my heart rate skyrockets, and I feel very very nauseous. I don't know if this problem is mental anymore. Even if my thoughts are not consumed by anxiety my body will react as if there are. Anytime I intense my stomach muscles for more than a few seconds I feel very uneasy, and the feeling is amplified whenever I'm in an anxiety-provoking situation.