Afib and Anxiety

I was first diagnosed with afib 2 years ago and in those 2 years, I find myself becoming increasingly anxious.  With every extra beat, I think I'm going to go into afib.  I find myself constantly monitoring my heart rate..is it too fast (at 75) too slow (55 at resting), in short, I feel like I've become a full blown neurotic and I hate myself at times.  I never used to worry like this, I feel as if I'm doomed, I'm stuck with this for the rest of my life.  I've had many tests, echocardiogram, nuclear stress, echo stress and several others, each one coming back perfect..all is well except for when I short circuit.  My last afib episode was 15 months ago, and I feel as if I'm working myself up towards another one and I KNOW stress is a major factor.  Even when I was in the ambulance, I had myself so worked up, I was making it worse.  It wasn't until I got into the hospital, that I began to calm down and I was back in NSR within the hour.  My doctor tells me to try to maintain a stress free life as much as possible, but is that really possible?  I'm just venting..I'm angry but..at who?  I suppose I should consider myself lucky that I'm not experiencing constant or permanent afib, but still, afib begets afib and it's with me to stay.  Does everyone go through periods of depression, the "why me" syndrome?  I'm stuck in it right now and I'm not very happy about it.