I think I have high histamine, so I tried a small amount of Claritin yesterday, and I think it helped with the breathing symptoms and weird head feelings from what I think. However, I must also have a new chemical sensitivity b/c I've been reacting to everything over the past month or so. While the Claritin helped with some symptoms, it increased the head pressure that I think is from chemical toxicity, so I stopped it. Now I'm a mess today, feeling weird in the head, a little dizzy and breathing difficulty. I also tried a small amount of Daosin today (1st time) and took liver supp, vit C, mag/cal - just a little of each. And it feels like I've overwhemled my system or something. Anyone ever experienced chemical sensitivity? I don't know what to do here. Help please. I could only sleep 3 hours last night and left work today. (I never missed work prior to this issue over the past few wks).