I took my two year old and 15 day old to a parade today. Newborn was in the pram but needed fed so I was sat ion the kerb feeding him covering his ear (should really have left since I felt the need to cover his ear). Anyway, whilst sitting the drum part of the parade - a load of snare drums - stopped right at us and the drums were level with his little ears (since I was sat on kerb). They stopped there so I got up as quick as I could but had to faff to get baby off he breast, manage two year old and navigate lots of people sitting around us. I am now beside myself that I have done serious damage. I am an anxious parent by nature and not sure if this is my anxiety catastrophising or if I have done serious damage to my little baby.
Feel so stupid for not thinking about this in advance. 
Can anyone offer Reassurance or advice as to what I should do now to mitigate damage (if that's possible)? Thanks so much xx