The OP is me every time I mow my lawn. All the dust and grass allergies get my sinuses draining like a a teenage girl watching The Notebook. Snot rockets are the only answer.
LOL. I actually did that last fall when I had a horrible cough accompanied by respiratory issues. It did help, but it was also miserable breathing your own hot, recycled breath for 2+ hours. Plus, I kinda like snot rockets.