I've noticed that I react to some wines. My face will get red, and I feel like my body temperature is going up. So, I avoid those wines. Smoking has never given me weird dreams (I don't smoke very often), and the only negative reaction I've gotten is that when I brush my teeth, my tongue will feel like it's burning.
If it's a hobby you want to stick with, try changing things up like others have suggested. Try just a little of the tobacco, and see if you get the same effect, only lessened. Also, an old survival tip I read once: rub some of the tobacco on the soft skin inside of your elbow, then wait a while. If you're reacting to something in the tobacco, your skin will probably turn red there within an hour or so. I've seen that method used to test wild berries and stuff like that before eating them.