I think i've had some form of MCS since I was a child. I always had headaches and got rashes and went to many doctors but it wasn't disabling. I started to get really sick in 2008 when I worked at walmart and it got really bad at christmas time 2009. I got my respirator in january 2010 and it helped a lot but it was the reason I lost my job a few months later. I got my official diagnosis in October 2010.