This is exactly what is happening with my right now in relation to chemtrails. When they don't spray, in less than 2 hours every one of my symptoms - emotional and physical - are completely gone. When they do spray, they all come back within minutes.

The way I know they are spraying is that I can taste a horrible taste in the air plus my sinuses begin burning. I have found that only a small percentage of the population can taste the air when chemtrails are sprayed, but I have been contact by a number of them.

There is so much I could say about this, but it would be best to give you a link to the whole story in case you're intersted:

http://globalskywatch.com/stories/my-chemtrail-story/story/01-Welcome.html