Sorry to hear Don, it sucks being this close and then have pm dropping in for a fuck fest. Personally I never had Pm indoors, I had it outdoors several times with rather depressing impact on my otherwise cheerful soul. I'm growing in a cge environment were everything is controlled, my humidity starting mid flowering never exceeds 50-60%, which kind a sounds high but I also use a HEPA air purifier and charcoal filter in there, and just never had any issues.
Just keep your eyes on high alert until chop brother!
Unity