Re: Smoking sickness:(
Usually people get headaches/sick when they chain smoke too fast. Try not smoking so fast, and take deep breaths of fresh air in between hits. There shouldn't be a rush to inhale smoke. It shouldn't be a contest of who can blow the biggest clouds, or who can take the biggest hit in the shortest amount of time. Smoking this way will just increase your chance of getting sick from CO poisoning.
Just take it slow and the session will be much better. It's also good to have something to drink while smoking.