Wow, anxiety can do strange thing. Just throwing this out there (cause I know you know what's wrong with you), but have you had your thyroid checked? Hypo can cause similar symptoms.
I'm sure it's anxiety, though. I'm sorry you have to go through this. You've had it rough lately. Have you been seeing a therapist? If you haven't, do you think they could help? I've had hypnotherapy and EMDR and I was a skeptic, until I felt it work. It's like magic or something.
Do you exercise? I wonder if that could help reduce your stress. I watched a reality show where contestants had to lose a ton of weight. One of them had terrible asthma and after he became active, his asthma vanished.
Anyways, I'm sure things will get better for you. As you know, it just takes time (and I never want to wait).