What were the few good weeks like before this recent meltdown? Did you feel consistently good and motivated, or were there still times you noticed yourself getting a little on edge and irritable? When I'm hypomanic, I find that it starts off with me feeling purely euphoric and motivated for the first 5 or so days, and then I begin noticing irritability and being on edge. This can errupt into tantrum-like outbursts, before I return to the "feel good" state. This may have been what happened to you, but it varies from person to person. Best of luck to you.