Yes, going to see a pediatric audiologist is a good idea. However, keep in mind that many audiologists are anti-sign language because there is still a lot of misinformation regarding ASL and the delay of a spoken language.
Basically, keep your options open. Keep using ASL and go an oral route too, if that gets recommended. In the end you and your child will end up using whatever communication form is easiest and most effective; and that's only going to HELP.