Saw my T yesterday (yes still the same one, still haven't quit

) and I was feeling very upbeat and "cheeky". My T was talking about how he would like for me to be on a more middle ground rather than swinging between feeling high and very low.
I know I have been through the whole diagnosis thing with him before and he suggested that labels were not useful so I didn't push for one. But today I am feeling confused, I had resigned myself to the fact that I was just "difficult" at times, but I am wondering if what he was describing was bipolar.
I know no-one is here to diagnose and I know the answer is probably to talk to my T. But I just don't want to make him think I am being overly dramatic about something that is maybe really normal and not a MI. Actually I think I am feeling a little scared.