My LO is 3.5 months (will be 4 months in 10 days). He has had a dry cough for a few days and manage to feed him when he is asleep. He has been really fussy with his DF for a few nights and takes 2 or max 3 oz (used to take 4-5 oz). should i stop it while he is unwell? yesterday after the DF he was stirring and moving his head which made me think he was uncomfy