It's a tall mountain of achievement that you're attempting to climb. Sure, it would be nice if you could get a free ride to the top, but then you would miss out on all of the wonderful learning experiences as you climb your way up and earn your place at the top. Besides, you'll need those experiences to help you perform well when you finally do reach the top.
When you can't stop thinking about the same problem, over and over again, and you keep thinking about the past, you are ruminating; you're engaging in an inefficient mental exercise. Let these negative thoughts pass. Instead, focus on what you can do now. Live in the moment, not in your mind.
Mixing your personal social media accounts with your work life can be a recipe for embarrassment and disaster. Don't risk your reputation.