After my appalling attempt at taping&jointing I needed to do A LOT of sanding. The dust is bad. Still 10 days later I cannot go into my garden build without a P3 mask. mopping, hoovering, everything I do just seems to disturb the invisible dust. I thought the rain would ease it but it's just as bad. I can feel it in the back of my throat and it makes me feel weird. I don't know what to do.. should I contact Environmental health? Are there special mist cleaners? Maybe I can hire some kind of air filter..