Hi there. I understand your fear and your concern. Really I do! But remember this. You are not going to the gym because of them. You're doing it for yourself! Stay focused on that. They don't matter, but you do matter! Convince yourself of this and the problems will disappear!
And don'even think about the bad things. We attract to our lives the things we think most about. So instead of thinking about all the bad things, think about all the good things!