I have a worried mind. Is there a way that I can maybe calm it down a notch?

In the past, I've experienced a great deal of betrayal and I don't want my past experiences to dictate my present.
I'm currently trying to work out all of my trust issues.
But my question is, "Why am I still suspicious and distrusting of others?"
I always seem to think that everyone's secretly plotting against me.
And this is probably going to sound really creepy but sometimes I feel that I have the ability to assess the thoughts and foresee the actions of others by observing them very closely(if that makes any sense).