What can my wife and I do to help her cough?

Yes, I had the flu and now my pregnant wife has a dry cough. She’s on day 2 which is somewhat good news considering when I was on day 2 of my sickness I developed the fever right away.

At this point, she has a scheduled appointment next week, what can we do in the mean time to help her out? Any specific medicines she can only have? Our baby is near his 6th month and at the stage where he’s, “soaking in her antibodies.” Should she be avoiding anything? Like milk? (I read as a child that the body reads milk in the system as a bacteria and therefore creates more mucus but that was in the late 90’s) Any help appreciated.