I totally sympathize with you. Mine is headaches and stuffiness. I've been pouring almost non stop each day for the past two weeks until this past Saturday. I took a break and cleaned all day, lol. No headache or stuffiness. Yesterday I poured 3 dozen jelly jars in five different scents and by the time I got to carrot cake, I wanted to lay down and die for a while. I'm pouring lots of spicy stuff for craft shows right now. I think that irritates it....and what a shame, because red hot cinnamon is my favorite. Right now I am trying out my new loaf molds. One is 3 wick and the other is 5 wick. I did both of those in harvest. Yep, you guessed it! HEADACHE! My advice....take a 2-3 day break. Do not pour, sniff, or burn candles. If your symptoms clear, you have your answer. Good luck, and hope you feel better soon.