The main difference is Cyclo causes mood swings very often in a day or a few days ... Bipolar cycles typical last at least 1-2 weeks or more ,, and BP II has hypo but not full on Mania. BP I has full blown mania which will also last weeks , Both also have depressions that last more than a few weeks ...

So it really boils down to the lenght of your episodes. If you have a good pdoc then he/she is treating symptoms and not just worried about a diagnosis/ label right now.