Baby Cough?

J

I feel so dumb. I'm a FTM and it's hard to tell if he's coughing from drool, playing with his vocal chords, or he's getting sick? He hasn't been sick yet, but has no other symptoms. Everyone keeps saying he's just playing with his vocal chords but he's coughing in his sleep? I don't think that he would be coughing in his sleep if that was the case. It seems like a pretty dry cough but also kind of like hacking like aaaahuh ahuh ahuh (if you catch my drift) I don't really know what to do for it or if I should just let it be and call if it doesn't go away ?He's 7 months next thurs.