Duo neb symptoms and conditions

I am 48 yrs old and have been on Advair 500/50 for a little over three years now and although it helped my asthma dramatically in the beginning, everyone around me has commented on the crazy mood swings I have been experiencing for the past two years. I have also developed a very persistent case of thrush in my mouth/throat that never seems to go away-the doctor keeps on asking me if I rinse my mouth and it's starting to get annoying because I'd be an idiot not to rinse out my mouth-I even gargle, but the thrush keeps coming back! Also,my throat always feel tight-I frequently feel like I'm choking and I get hoarseness that interferes with the important thing like reading a book to my son. Recently, I have started bruising very easily. Everytime I mention all these things to my doctor she says that I should stay on the Advair and disregards my complaints about the side-effects. I would really like to stop using it, but I stopped once for Three weeks and I had a really bad bout of tightness in my chest and shortness of breath-any suggestions on how to get off it and what I can do instead?? I forgot to mention that I have gained weight and even dieting won't get the weight off-I am very active and exercise, but the weight stays.