I was JUST out with my friend this afternoon and she was telling me she is real lightheaded again, sort of woozy and her head feels "stuffy", etc. And she said, "This seems to happen to me only during allergy season, it has to be my sinuses" And she DOES get this every time she gets her allergy problems! I recall her complaining about it each time. So I think it IS allergies! In fact I am going to e-mail her and tell her about your post!