J.U.
I say it shows that you have a good doctor who wants to have a second pair of eyes take a look and make sure he is right/ or wrong. There are doctors out there that once a parent states they would like a second opinion they get defensive.
I would try to take a deep breath. Take each day one at a time and don't make yourself sick with the "What ifs". Try to keep busy and focus on your precious babe. You need to stay strong. It's ok to have your moments just don't allow them to overcome you. It's great to be educated, but do not go crazy researching everything to death.
I'm not a doctor but, I had a son who it took years to get him diagnosed with profound hearing loss. There are many syndromes associated with hearing loss and genetics can also play a role. It took about 3.5 years from the time he was born with therapies as well as testing and specialist visits to finally get that sigh of relief. I just took it one day at a time. I tried to network with other families which wasn't easy but a great support.
I wish you and your family good luck, keep us posted.