You really need a psychiatrist to answer this (and if you're seeing one and aren't sure about the diagnosis then maybe get a 2nd opinion?) but there is a range of issues that fall under bipolar and while it doesn't sound like you have ever been fully manic, so not BP1, BPII or cyclothymia are possible. BP2 had hypomanias which are less intense than full mania. Cyclothymia is a frequently changing mood but not so severe that it qualifies as BPII although it remains in the BP spectrum. So maybe read about those and ask your psychiatrist some questions to clarify the diagnosis and why it was made.