How confident am I on my health?

This is a tough subject for me. I am at a point where I feel okay most of the time but am not sure I feel well enough to make significant changes. I mean should I look for a new job? At my current job, there are some pluses and some minuses. The negatives are things like commute distance (farther than I like), lowish salary - decent but I wouldn't mind more (who wouldn't?). The pluses are total flexibility in my schedule and I am an established employee.

If I left my job I would have to establish myself somewhere else and have no seniority. If my health acted up and I couldn't work for a week or so (not an unknown event), would I jeopardize it? I am hesitant to look for another job because I am not sure I am healthy enough to establish myself at a new one.

On the other hand, I see my new primary care on Monday and I do NOT expect anything new and unexciting in my health. I don't think I have any bad things going on (but not to jinx myself or anything).