In my view, you need to have an updated diagnosis and be treated for whatever it is
that is causing your depression. The highs and lows do sound like bipolar II, but it could
be anything, frankly, and as another said, we can't diagnose.

You do need to be on medication, though, and a psychiatrist could help you so much
to get stable and feel so much better.

Please make that appointment and end the suffering you're going through.

(Incidentally, bipolar II is not considered the most serious of mental illnesses. The
depression is difficult and draining, but there is no psychosis and there are no full blown manic attacks. As one said, the illness is a spectrum and is constantly changing in its effects.

Someone has even suggested (a professional) that it is part of the spectrum of bipolar and schizophrenia illness. I'm reasonably confident you don't have schizophrenia.)