Make a mountain out of a molehill

Definitions:
CD: to make a slight difficulty seem like a serious problem
WD: To treat a problem as greater than it is; to blow something out of proportion; to exaggerate the importance of something trivial.
MM: to treat a minor problem as if it were a very serious problem
UD: To exaggerate, to interpret a specific situation as being worse than it really is.
CL: to exaggerate an unimportant matter out of all proportion

Examples:
- You're making a mountain out of a molehill. You wrote one bad essay - it doesn't mean you're going to fail.
- If you’re stuck in traffic, try not to make a mountain out of a molehill worrying about it too much. It could be much worse.
- You don't have to be that worried about this simple situation, don't make a mountain out of a molehill.