FTM: Son Has a Cold

Ok, a little nervous...first time my son has been sick. He's 8w. He's sneezing, coughing, and sounds generally congested. No fever though so I believe it's a cold rather than flu.

What can I give him to treat the symptoms? Make him more comfortable. He's so young for all the medications. Silly question - I can just literally call the doctor to ask? I don't have to make an appointment for my son do I? First time, sorry if my question is ignorant. Worried new momma here. Tia.