Hard to say. Bipolar with paranoia? Have you been diagnosed as bipolar? Have you ever talked to a psychiatrist before?
I see a lot of this kind of stuff at work (I'm a psych nurse). But these men and women feel that their behavior is completely and totally normal. You're obviously asking what's up, so that tells me that this is new to you.
Your behavior appears to be a psychotic nature. Psychosis is a disturbance in your thought patterns. I'd need more details to be more thorough. Has anything like this ever happened before?
If you feel that you were completely overwhelmed with stress, it is possible that you suffered from a BRIEF psychotic break. But without more details I can't say anything certain.
I would STRONGLY suggest you go see a professional about this, though.