Toprol-XL and blood thinner

Hello all,
I'm a 45-yr old Air Force Major (Male) recently diagnosed with asymptomatic chronic Atrial Fibrillation (As in I have it and was walking around not knowing it). When I went to see the cardiologist, my B.P. was only 120 / 74 (Which, until they changed the rules, used to be normal)and he puts me on Diovan 80mg once a day plus Coumadin 5mg. Well the Diovan almost made me faint and I had numbness in both arms, plus a funky rash, kind of like chicken pox showing up on my arms and thighs.
I went online and read horror stories of Diovan so I stopped taking it immediately (I had only taken four doses and never had any horrible symptoms until after I took the meds!). Then the Dr. put me on an Event Monitor and it showed I was indeed in A-fib all the time, plus at night, my heart was racing briefly to 200 a minute while I was sound asleep. So he puts me on Toprol XL 100mg once a day.
Immediately I had trouble sleeping (Which I never had before, ever!) with crazy dreams and tossing/turning. My B.P. dropped to 88/65 and my fibrillating heart rate was 64!!! I was so mad because I actually felt better before the meds. I found this site and saw what everyone was posting and immediately took myself off the Toprol XL.
The day after stopping the Toprol I had slight chest pains (Like angina or gas bubble) but they went away on their own. I slept fine the next night.
I'm having an Electro-Cardiversion done on the 21st July to see if I can stop the A-fib and get in normal rhythm. I know the Dr. is going to be mad at me for stopping the Diovan and Toprol, but I'm sorry, I'm convinced there is a better way to beat all this (Namely exercise and eating right). Being in the service means you have to be Mr. Physical and Mental "perfect" all the time. I cannot afford to be diagnosed with depression in my line of work! Thanks to all on this website and I wish you the best.
PS. for those who think I'm being ignorant of my medication, I have a nice fat insurance policy and Power of attorney for my wife and kid in the event I keel over!!! I may be medication intolerant but at least I took care of my family.