What you describe is identical to my condition. For weeks, paralysis and then, one morning I get up and for no apparent reason...the clouds break, the sun appears, life seems easy, manageable.

So yes, could be the meds kicking in but whatever the case, I'm happy for you. Pace yourself, it's easy to crash and burn. Hope for the best, prepare for the worst. I find that routine is everything and IF you can just keep it going through the lows, you have a much better chance of pulling out of it sooner. Diet, exercise, talk, these things are much more important than people seem to realize.