Sometimes when I was drinking heavily I would get bursts of energy or happiness lasting about 30 seconds, Paulos. This would happen when I was alone & pacing my apartment. I was depressed and lonely besides these bursts, plus I had nothin to distract my attention like T.V. or reading. Could just blame those on boredom and too much time in my head though. Sure does seem like you are on one hell of an emotional rollercoaster ride.
Keep it up with the strongness.