Allergies

I am pretty convinced Tristan has allergies. The question is, just what is he allergic to? He has puffy red and watery eyes that he keeps rubbing and a runny nose and sometimes a low fever and he is sneezing. They cut the grass this week and the car has been covered in fine yellow dust so it could be an allergy to pollen or grass. Also I found Callie in Tristan's crib and on his play mat this week several times. I wonder if he could be developing an allergy to the cat? I feel like all I have done the past several days is wash, wash, wash! I keep washing his blankies and changing his sheets and clothes. I keep giving him a bath and wiping his snotty nose and I keep washing his puffy eyes with a cool wash cloth. We stayed inside all day today and I think it was worse(maybe it IS the cat...or dust?). He went to the doctor yesterday who said it could be a virus as well, but the signs are more like allergies. Sigh. Also I found out that kids with light skin, blonde hair, and blue eyes have more allergies than other kids. Kind of interesting.