She's absolutely perfect - 9-9 apgar and perfectly healthy

My question is that she had her hearing test today and she failed in one ear - they said not to worry that it's most likely fluid in the ear that has not drained yet or been dried up - that they are going to test her again before we are discharged tomorrow - but of course as a Ftm I'm freaking out - nurses are reassuring me that it's perfectly common and not to worry but I can't help it.  Any of you seasoned moms have this happen or any Ftm that know more about this!?? Google is just making it worse for me lol