Ds3 is 1 month old, we don't smoke and he has never been around cigarette smoke before. We took him to my mums house for a couple of hours yesterday, she smokes in the house, but didn't while we were there. I could smell it and feel it at the back of my throat and that night DS3 was really snuffly, he's fine now and has never had it before, could it be from the smoke as he isn't used to it?