You have done nothing bad. And this is why I don't believe in Karma. Bad things happen to good people and good things happen to monsters and lazy bums.
Just know that being a good decent person is it's own reward. You have everyones respect and love who know you and all hope for happiness for you. Things have to get better and they will. Please try and stay positive things will turn around and this is just a small blip on the screen of your life.