Welcome to AllDeaf!!! 
Good luck with the little one and treasure the child always, no matter what.
You could start both of you on an ASL journey with "Signing Times" videos or there are other designed for signing with babies. I have seen babies as young as 6-8 months beginning to sign with their parents and they were all hearing. You just start from day one and keep it up, and before long the baby will pick it up and use it like nothing. If you find that your baby is hearing, then you will have started her on a path of having bi-lingual language.
Good luck and have a fantastic journey. Be sure to check different parts of this forum as we are a very diverse group of people. Some born deaf, some late-deafened, some parents of deaf or hard of hearing, some hard of hearing. We also have a lot with hearing aids and some with cochlear implants. We even have some deaf/blind people as well. I myself am late-deafened and total deaf. Like I say - we are a very diverse group of individuals. We do get into debates and have a lot of fun that is sometimes misunderstood, but just know that we all respect each other's individualism.
