Posted: 19/06/2014 at 13:18
A friend of mine is affected badly by chemicals and the likes of air fresheners. What he found in the garden was that the pollen and cut grass often made things worse (when I lived nearer I'd cut his lawn for him while he made us dinner - good trade!!)
Did you ever get symptoms before that might indicate pollen was to blame?
Keep out there in the garden, but ditch the weed killer and see if things change. Its a fantastic gentle way to exercise and keep those lungs strong.