To think a small problem is a big one; try to make something unimportant seem important.
Делать из маленькой проблемы большую; "делать из мухи слона".
Calm down. There's really nothing to worry about. You're making a mountain out of a molehill.
Успокойся. Здесь не о чем беспокоиться. Ты "делаешь из мухи слона".
Sarah laughed at a mistake Betty made in class, and Betty won't speak to her; Betty is making a mountain out of a molehill.
You're not hurt badly, Johnny. Stop trying to make a mountain out of a molehill with crying.