For me, it gets difficult to distinguish whether depression is just lifting, or if it's the calm before the storm, where true, undeniable hypomania begins. I think with most of us who have Bipolar, we are sensitive to little 'cues' that make us wonder if an episode is starting, or if it's just a normal state of mind where elevation is part of our natural baseline.

You say you are happy, and from your post, it sounds like you are in a pretty good place and not in an episode, so I would say it's best to stay in-the-moment, enjoy the good times, and try not to worry!