I've been a smoker for about 15 years, but I just started smoking a pipe about 2 months ago. I bought a tin of Peterson's Irish flake when I first got my pipe, and I really enjoyed it. I bought a second tin a couple days ago and finally opened it today. I packed a bowl and started puffing, and then got really sick. I'm pretty sure it was too much nicotine but it seems strange that the first tin I had was fine, though I definitely got a nicotine kick from it but not enough to make me sick, but then the second tin made me so sick. Is it normal for tobacco's to vary from tin to tin? What can I do in the future to avoid overdoing it with the nicotine, and what can one do after realizing they have smoked too much?