Mouse in my room?

Hey, I was walking to the attic and I screamed when I saw a mouse running away from me. So it went down the stairs and into my room. ( I am afraid of anything small or fast. I just start to hyperventilate and cry.)My sister went to my room to catch it but she said she saw it in the corner a second ago and its gone....

What, exactly, are you afraid of? Believe me, that mouse is more frightened of you than you are of it. You can harm it, but it can't do anything to you. Put out some traps. That's all you can do. If your house seems to have a mouse problem, call an exterminator.