hypoth. & problems breathing

Hi, my breathing has been all over the place during the last few days. Does anyone have any ideas on dealing with this? I'm not sure anymore if its from anxiety or from the hypothyroid. Anemia used to give me breathing problems in the past but I'm ruling that out since my levels have been better.
I have been doing breathing exercises to try to stabilize my breathing..thats what I have been doing for the most part in the last days. It helps for a short while but if I stop doing it it gets out of control again. Tried Xanax today as well but so far I cant say that its helping. I'm supposed to get a few things done today and I'm too dizzy to go outside.