@Christine3560 A few possibilities:
1) You have requested to book' on Airbnb. If the host doesnt get back to you within 24 hours then rescind your request and book elsewhere.
2) You instant booked on the platform in which case you will have received an Airbnb confirmation as soon as your payment is received unless they are awaiting ID confirmation.
3) You have booked on a scam platform purporting to be Airbnb. If so there is no booking and you should contact your bank to try and stop the payment
4) You dealt direct in which case it might be a scam but it is nothing to do with Airbnb.
I am afraid we need more info before we can try to help further.