Baby cold.

Ka

My 2 month old has his first cold :( hes sneezing, snotty and has a cough. He got it from me. I'm scared of it turning into something more like RSV. I've been using saline nose spray, the nose freida and lots of breastfeeding and rest. Is there anything else I can do to make sure it doesn't get worse? I've heard to run a humidifier in his room. When should I take him into the doctor? If he spikes a fever?