TL;DR : I have BPD and I may have bipolar II. If anyone has both, what do your hypomanic episodes look like? 

I got diagnosed with BPD a little over a year back. And now my psychiatrist thinks that it's likely that I have bipolar II but we are yet to catch me in a hypomanic state. My depressive episodes are fairly easy to recognise but I'm not sure how hypomania will look for me.

I've been on Lamictal, Sertraline and Atomoxetine for around 2 months and I have been feeling a lot better, like weirdly better. And it was a striking difference because I was in one of the worst depressive episodes of my life. I felt energetic like I haven't in the last 3 years, my mood has been significantly better and my family has noticed this change in me. It feels like there's a lot I want to do. I've gone on cleaning sprees, almost obsessively. 

There's also been times where I've been very irritable and I've had racing thoughts, though there were anxious thoughts. My sleep was fine at first, but it's been disturbed and short for the last two weeks. I've been very fidgety and almost agitated at times. 

At this point, I'm confused whether I'm feeling better or this is hypomania because I don't know what "normal" is anymore. And because of my BPD, I tend to get triggered on a day to day basis and my mood fluctuates throughout the day but it's been less intense.

Between all of this, I don't know what's happening. How can I differentiate between feeling good and hypomania?