Help with bipolar disorder?

I have been haveing symptoms of bipolar disorder for quite a while. Seemingly good moods can turn on a dime. I can be very irriteable at times and small annoyances are apt to make me unreasonably angry. I often act and speak without thinking. At many times I feel it absolutely neccecary to speak my thoughts and opinions, even when it is inappropriate to do so. These symptoms are seriously negitively effecting my life! I am uninsured so I can't just get help from a therapist. Does this sound like bipolar disorder and what can I do about it?? Thanks a lot.