It seems like everything you describe is sound related?? Might not be an infection but sensitive hearing? Maybe something like that....
My LO hides his face and blushes when he's being shy but I haven't heard of a baby having anxiety.
That's what I thought at first, but if we are just playing around with him and singing loud he doesn't do it. It's only when he knows he's not supposed to do something. [like he will pinch and the immediately cover his ear because he knows we are going to tell him no...and we don't even say it loud he just hates being told no.] the dr didn't seem too concerned just wanted to see if any one else had this going on.