I spend a lot of time doing Pollyanna/Scarlett O'Hara thinking.
Pollyanna always looked at a situation and tried to find the better/good side of it.
Scarlett O'Hara's most famous, life changing line was: I can't think about that now. I will think about it TOMORROW.
If you look at everything going on in your life right now ... either philosophy is a pointless exercise of futilization. However, if you take your list of problems waiting for solutions, and approach them one by one, the task becomes a bit more manageable.
Frankly, I don't know how you can find any peace until you find a higher power than yourself to trust.
Could you possibly be beating yourself up more than life is? When getting banged over the head with some of your problems and piling on by berating yourself for "poor" choices in the past, it is pretty hard to not feeling overwhelmed.