Flecainide Acetate and 6 years

I have had A-Fib for approx. 6 years. I am a 61 yr old male, and have taken Flecainide for approx. 2 years, along with Diltiazam. I have loud ringing in my ears. I often wake up in the night with a very rapid heart beat (in normal rythnm). During the day I'm not bothered much by a "pounding" heart beat, but am at night. I still go into A-Fib periodically with this medication, and it usually last 6 to 8 hours before going back on its own. A-fib attacks vary--I may go several weeks, then have problems 2 or 3 times a week.