Welcome to HCM.
After going through your history ,I must say you have given clear picture of your problem.
You are having Chronic bronchitis
along with allergic sesonal acute exacerbation, but are you taking inhalers or medicines for breathng problems?.
As chest pain
was severe and EKG was done which may be low voltage and clockwise rotation,with right axis deviation, which may be Cor pulmonale
that is effect of lung disease on heart.
If pain is severe a repeat visit to ER with repeat EKG is warranted as heart problem can not be ruled out, so kindly get a EKG,if nothing significant is found then you may be wise to take any safe analgesic
Then you can wait for cardiac evaluation.
Feeling of hot flashes could be due to age ? perimenopausal hormone changes.