Well I don't know about the official number of days it has to last, but that is totally what I'm like when I'm hypomanic. I always think its just me finally getting motivated to get all my ideas done - then more ideas come - and my house gets cleaner and cleaner and more and more organized. I don't crash after every time though. Only every now and then. Mostly I just go back to a sort of flat, less motivated style of living. Hope you get the most out of feeling good and don't crash.