@Brittani7 You don't say how long it's been since you messaged her, but I'd give a guest a couple of days, especially with the booking being a ways away. We tend to assume they are just not being polite or ignoring the message, but guests could be in transit with no access to Wifi, they could be quite busy, we have no idea why they don't respond right away. Some guests don't even have their notifications set so they get a notice that they have a message. So they just instant book and don't look at their Inbox again, just assuming that their booking is dealt with and all they have to do is show up on check-in day.
If a guest doesn't respond to a follow up message, I'd ask Airbnb to make contact with the guest and instruct them to respond to the host's message. I've had to do this a few times.
Also, you have the guest's phone number. You could text them if it's not some international call, and let them know you've sent them a message and to please check their Inbox and respond. This has been successful for me a couple of times.