I don't know... but it kind of sounds like you're chasing the speedy feeling that you got in the beginning and you've burned yourself out in the process.
I don't think Iodine is supposed to make you feel speedy... Turn the lights on... lift the cloud of fog... sure. Not speedy though. If it feels unnatural, then it's probably not right.
Perhaps there's some other underlying cause for your fatigue. I couldn't even begin to guess.... Hope you get it figured out though.