I'm on my second day of clen use - 40 mcg yesterday, 40 mcg today. I took it at 6:30 this morning, then, at work, at about 10:00, I started developing a headache. Took two Advil and kept working, but by 12:30 my skin had turned purple, I had gotten the chills and was about to puke. I left work and came home at 12:45 and slept in a 77 degree house, wearing a sweatshirt with the hood up, jeans, and under a blanket. It's 4:30 now and I still have somewhat of a headache, but the chills are gone. I've been drinking PLENTY of water, and have eaten 3 bananas in the past 24 hours. I'm supposed to up the dosage to 60 mcg tomorrow, but, if I take it at all, I'm going to just do 40 mcg to play it safe, and take Extra Strength Tylenol throughout the day. Will my body adjust and get used to the Clen? Is it usually just bad at the beginning?