When my two year old is about to get a cold, she suffers from two days of constant sneezing. All allergy tests have come back negative, but she does have asthma triggered by respiratory infections. Does anyone have any suggestions? I have tried Benadryl, but it did not relieve the sneezing very much. (I might not be giving her enough!) Has anyone tried children's Claritin? How about natural remedies? Thanks!