I read somewhere that pollen only lasts for 3 days (I find that kinda hard to imagine).
However you should be safe for you next grow. I grew a male in my basement along with a female and got a bazillion seeds. In fact I think every single calyx was pollenated, however the next grow I got absolutely zero seeds. And that was in a pokey corner of my basement, next to a workbench, where there's loads of nooks and crannies for the pollen to get into.
Just give your space a wipe down when you're done and you should be go to go again.