thanks for the replies. after the first 1.5 weeks the fog lifted a lot, but i still feel a little slow upstairs. my only real concern is the concentration, fatigue and sleep disturbance. i'll sleep for one hour max then wake up. and my sleep is filled with the most vivid dreams. this repeats itself at least 6 or 7 times a night. hopefully i'll get better although i don't want to take sleep meds