Yes, it is possible.
BUT - in your note you say that your mood changes depenant on circumstances in your life .... this is not Bipolar. This is normal.
Bipolar episodes "just happen." Usually when I have an episode, I can not put a reason for it...there is nothing that triggers it. I just start getting depressed or get manic. It is not because of anything.
Also, rapid cycling Bipolar is rare. It is not common to have someone who cycles frequently. More common is Type 1 and Type 2, that show normal mood episodes.
yes -talk to your doctor. bipolar can be misdiagnosed as the symptoms vary so much by patient.