short of breath
Marijun, I don't want to scare you, but Jeanie is right. I had very similar symptoms in October. I have asthma and thought it was just a bad attack, but inhalers didn't really help. I had a dry cough that was worse when I was laying down, and I was very tired. I finally got so short of breath that it scared me, and I went to the ER (not my first choice, since I don't have insurance either!). Ended up hospitalized with heart failure. So, if it gets worse (or doesn't improve significantly) you may need to bite the bullet and see a doctor.
Take care of yourself, and please let us know how you're doing!
Jean Hofve, DVM
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