Hi Kim,
I think the only way to know for sure is get tested. My son Daniel, the poor kid is allergic to most everything, also many food items.
The purifers work well, I try and keep the birds, sprayed and showered everyday. Luckily the birds don't seem to bother him, the rabbit does though so he stays away.
Get it checked out, we are now in seasonal allergie time, so that could be it too.
Good Luck.
Dawn <img src="/images/graemlins/smile.gif" alt="" />