Fledgling, I think our health has a lot to do with our outlook on life. You may have a less robust system than your husband, but you have a wonderful energy for life, and you seem to have an optimistic outlook.
I've had several health problems myself, but when I changed my thinking, as much as changing my diet and lifestyle, my health was much improved.
Medical doctors are good at fixing broken bones, and making diagnosis, but they aren't much good at the empathy side of things. Then again, if they had to give the same amount of emotional support and empathy, to all their patients, they would be totally drained themselves.