I find that when I am in any kind of competition, or stressfull driving, I get very shakey, and sometimes light headed. It seems to get getting worse, as I get older. Is there anything I can do to control this?

This sound like an anxiety problem. Maybe seeing and talking to a therapist would help. They might prescribe you something that could help. It could also be a physiological problem, have you had a full checkup from your GP?

Definitely, talk with your doctor, there will probibly be something that can be done once they identify if its an anxiety problem or a issue that affects blood pressure. Yes I know TWO people whos blood pressure drops significantly under a lot of stress. My wife and my mother both.