Advair HFA and drug interactions

Have been taking Advair 250/50 since October, 2002, and have not had to use an emergency inhaler once since that time. HOWEVER, had to start taking the drug every other day, once per day only, to eliminate hoarshness since I speak with clients for hours often during the business day. With very wet summer, was having some wheezing due to mold reaction over last several weeks, and increased dosage to once, every day. Last two days have had irregular heartbeats and I went off of caffeine totally months ago due to a previous arrthymia episode that lasted 5 days (wore Holter monitor for a day) some 4 months ago. Stopped all caffeine (except some chocolate!) and all alcohol at that time, but who can eliminate all daily stress. Convinced that Advair is causing the premature beats since there is causality to the increased dosage of late. Five months ago experienced periods of dizziness that disappeared after several weeks. There are studies now that steroids, in suppressing the body's immune system and its resultant reactions to triggers or allergens, can contribute to the onset of blood cancers such as lymphoma and other immunological diseases. Use Flonase for sinus swelling, and now looking for alternative to Advair. There is no question in my mind that a patient has to constantly question both drug interactions and overall side effects, i.e., cost-benefit analysis.