Is This normal or do others experience this?

[Decco]

Ok I have this problem that as soon as i think of somthing that might happen the complete opossite will happen. Examples of this are once when at a football game i though oh i might see Mr C but instead i saw Mrs M. another is i was about to invite a friend over that i had been waiting to come back from overseas and i call him and no he can't come, although i THOUGHT he would, so then i was sad saying that he'd never come over to my house again 2 seconds later the phone rings and he can come. is this normal or am i the only person in the world with this problem