I think to figure this out, it's important to know your baseline. What is your range of emotions normally?

Most people (i.e. those with and without BP) experience a wide range of emotions, from down to up (and everything in between) and all of this can be perfectly normal. Have you had other times when you've felt really happy, but then it turned out not to be hypo? I think when you're coming out of a depression, it can be particularly hard to tell, because everything feels so so much better than being depressed.

I would look at the criteria. And pay special attention to how many symptoms must be present in total, and how persistent they must be. When I say persistent, I mean not up-down-up-down, but a persistent experience of depression or a persistent experience of a set of hypomanic symptoms. I think it has to last for a minimum of several days in a row (except in rare cases), and you have to be able to tick off several symptoms that are experienced simultaneously.

I don't know whether you're hypo or not, but I would say just keep in mind that happy and even giddy are often just that. And enjoy it!