Sounds a bit like generalized anxiety disorder, not that I have expertise to diagnose. Some of what you described reminds me of what I went through. I was always on edge, and even when everything was going well I was worried. But that way of thinking can be so exhausting...I ended up moving toward the other extreme--not worrying about too much of anything at all, which was not productive/healthy either. Now I'm moving toward a more healthy balance. I can't say that anything specific helped me except that, in retrospect, the things that I worried about always seemed to seem so small in the grand scheme of things.