I have not gone to the doc yet because I wanted to see how it played out. Right now on day 3 its not as bad as it was. Every day it gets alittle bit better. I think It might just be an allergy. Its weird because I was on my last day of DNP and I went over a friends house who has cats and i am very allergic. Thats were the hard breathing started, but it never went away. Its abit weird.