Welcome in H.C.M.
I have gone through your query regarding heart flutter. Though you are also having bronchitis
and passing through menopausal age.
Heart Flutters are produce by-
(a) Some anti cold drugs which effect on QT segment of cardiac cycle
(b) Menopausal age is well known for heart flutters.
Therefore both above factors may give rise your symptoms. But I would like to inform you that menopausal lady becomes more vulnerable to cardiac diseases as compare to adolescent. Thus it will be better to consult cardiologist
to rule out cardiac involvement.