you are giving to yourself the key to your question, the hope, so in the end, you are not so far away to find a solution, you already know how to fix it, you just need some tool/way to do it... let me show you a posible way to do it by replying a mate in this topic.
first to relieve stress and negative thoughts is to stop thinking for a moment, relax, ....
Eckhart tolle teachings are a good start...