Is there any way to actually tell for sure whether you feel hypomanic or just in a very good mood?

I have been hypomanic (as far as I know) for about 8-9 days now and it has now begun to drop, but not into depression. It seems to be a milder form of hypomania where I feel like I want to be alone and feel irritable but also feel less sleepy than normal but have less hyperactivity than I've had for the past week as well as my thoughts slowing down. However, every now and again I will get bursts of energy where I need to get up and just jump or jog or something. It could be because I've been trying to maintain the euphoric state with coffee and forcing myself to be as active as possible to try and induce the euphoria again...

My baseline is slightly withdrawn, people know me as socially awkward and prefer to be in the background, and I feel like my euphoric hypomania (or something else?) has been fluctuating from irritable, wanting to be left alone, to wanting to talk people's ears off...

So confused.