What you wrote does sound very impulsive, but because I don't know your baseline, it's hard to know what those actions represent for you. I do think that for many people such impulsivity could be a bit beyond hypomania, but again it really depends on the person. There are plenty of people that are impulsive, but not bipolar.

I think what you need to know, and sometimes it requires other people to let you know (you might lack insight at times) is what other hypo(manic) symptoms you have. In your post you only cite impulsive type symptoms. When I'm hypomanic or even manic (I have bipolar type 1) there are a number of symptoms that can be recognized. In fact, according to the DSM-5, you have to have exhibited more than a few to qualify for an episode, like the following:

*Insomnia (sleeping 4 hours or less per night for multiple nights)
*Talking fast and/or loud
*Feeling elated and/or extremely irritable (possible tantrums or outbursts)
*Racing thoughts
*Acting inappropriately in public (people notice), such as inappropriate statements, humor, actions, and other off-beat or unacceptable behavior
*High energy
*Impulsive behavior (like you cited)
*Take on especially big projects or become focused on many different things at the same time.
*Hypersexuality or at least becoming very flirtatious
*Possibly grandiose thoughts. Delusions or hallucinations if very manic.