Well, if there's one thing I've learned in the past year working anywhere from 50 to 70 hours a week: work is an important part of our lives, but you can't let it consume your life entirely, and life is too short to have a job that you hate. I'm lucky that I really enjoy both my jobs MOST of the time, am working in the field I want to be working in, am making good money, etc. but that hasn't always been the case. I've always been one who hates to "give up" or admit that I can't make it work: but sometimes, its time to move on. One thing that helps me make those sorts of decisions and that calms me a great deal--I'm very anxious by nature as well-- is to get everything down on paper in a pro and con list. Then, you can remove your emotions from the situation and it generally is very evident what you need to do about it based on which list is longer!