My 4 year old is constantly sniffing, and I mean constantly all day. It has been going on for the past 4 days. Im not sure what is going on.. I took him to the pediatrician and they said possibly allergies but I'm not totally convinced its allergies. They put him on Zyrtec & Flonase and it doesn't seem to be helping. It's driving me nuts & I know it's got to be bothering him. Anybody else experience this with their child???