Im sure those of you who suffer from anxiety can relate to this particular part of it, I am curious - how do you deal with paranoia/panic when it occurs?

I get this all of the time, and the worst part is that I never talk about my paranoid fears. It all gets repressed and then I get stomach aches from it.

For example: if I am at work and I hear that we have an office meeting, I immediately think that my boss is secretly planning on publicly firing me.
Or for no reason at all I will think that my boyfriend wants to break up with me. I used to constantly think my friends hated me and talked bad about me, though now I dont really care what they think of me so whether or not they are means nothing to me anymore.

But, like I said, I never voice these thoughts to anyone. I feel embarrassed by my paranoid fears, part of me knows im ridiculous, the other part of me cant stop thinking about these things.. My sister had some anxiety issues- all she ever does is talk about how she feels and what she is worried about and it gets very annoying. Its like the 'boy who cried wolf' she's got a problem so often that no one would take her seriously if there really was something wrong, and I dont want to be like that.

Anyways if you guys have any ideas as to how to deal with this aspect of anxiety I would like to know, because how I am handling it now doesnt work all that well, it just makes me feel sick and repressing everything is just going to make things worse in the future, im sure.