What you were experiencing is called pressured speech. Although I am yet to be diagnosed bipolar (trust me, this is ongoing) this is something that happens to me alot. It is nothing to be embarrassed about. In fact I kind of like it when I get like that. It is important to keep explaining your behaviour. Have you been diagnosed Bipolar? If so, explain to ppl why you behave the way you do and ask that they understand. It is also good because then ppl can be aware you become dangerous (ie. delusional etc.)