I think I've become allergic to cats

Every time I pet my cats I sneeze and sneeze and sneeze and my eyes get a little itchy. It's not unbearable, but it's very annoying. The itching and sneezing doesn't stop for another few hours after petting them. My dad and my aunt are both allergic, he said he started getting allergic when he was around 19. I'm 21 and have three cats. :( I was always hoping it wouldn't happen to me. Anyway here's my sweet, hairy Momma cat.