RE: the shakes
I'm on a mild tranquilizer for stress from my business. I worry about everything all the time and when it got bad I'd have a panic attack and start shaking and thought I was having a heart attack. To the point, ask your Doctor, maybe if you tell him whats going on he might be able to help. I'm not saying you should start taking drugs everyday but there might be something very mild that will help you only when you go flying. You don't want to fly until you see how it affects you. I know other pilots that have gone to their Doctors and they got help for it. After awhile they didn't find they needed anything anymore. Good luck.
Gibbs