I was basically born with allergies. When I was 8 or 9, they mysteriously disappeared. When I was about 14, they came back again. It wouldn't hurt to get checked out...you may have developed an allergy in the past 5 years.

By the way, are you a contact-wearer?

I've had really good results with Patanol for my allergy eyes. I used Zadator for about a week, but it burned SO badly when I put it in that I stopped using it.

Let us know how it goes!