the habit of anticipating the worst

[Guest guest]

I aware that I got this habit. Take an example, one of my client paid $2000

before, and the rest $500 paid 2 days late. during this 2 days, I begin to think

some cheating might happen, etc. and I feel some sensation of fear around my

neck area. and I pick phone to hurry him up. actually I shouldn't do that, this

will create mistrust between us.

This habit cause obstacles in interpersonal relationships. and unnecessary

suffer too. Sometimes I am too quick to draw bad conclusion about people and act

according it.

anyone have similar feeling and knows how to deal with it?

any self-help book on this?

Thanks!