Advair HFA and embarassing

I am on Advair 500/50. I feel better than ever but have developed a tremor. The tremor is in my family, and appears to be triggered by strong medications. I started on the lowest dosage of the inhaler, increasing it over the past five years, but my tremor didn't become noticable to others until I started using the 500/50 strength. The shaking increases when I am nervous or stressed. It has become embarassing, especially at work, but if shaking is the price I have to pay to feel this great, I'll take it. I would, however, like to get off such a powerful medication, but don't see what other choice I have. Any thoughts?