That's a pretty fast reaction to meds. It's hard to know what's going on, but if you're not being destructive and just enjoying having energy again, that all sounds good. My understanding of hypomania is different than just feeling great; it's got elements of irrationality and destructiveness to it--otherwise, if it's just a sense of feeling great, why would anyone treat it? It's good that you're aware enough to watch for signs of spinning out of control, in case the current feeling is a precursor to hypomania. I would also wonder about that immediate response to meds. Are you typically that sensitive?