When things are worst, there is the most room for improvement. And when you improve, you will feel better.

I don't have any concrete advice, as you express problems on many different fronts. Try to think in small steps, small improvements, one problem at a time. Don't think/worry yourself in a hole by combining all your problems together. It will be impossible to solve all your problems and issues with one solution, so don't think you need to look for it.