Hi @Rachel221,
Welcome to the Community Center!
I have just double checked and you have Instant Book enabled - this means that guests can book directly, without needing to wait for your approval. If you don't want this feature enabled, you need to turn it off asap to avoid getting bookings without your knowledge again. This Help Guide explains how to turn it off.
It can be hard to get your head around everything when you start hosting - I would recommend you have a look at these Community Help Guides and also look in the Help Center to get to grips with the basics. There's also a good thread here with Tips for New Hosts, shared by other hosts.
Just to let you know, I have moved your post here to a new thread so that it doesn't get lost in another discussion and it is easier to find. I have also removed personal details and given it a title - please let me know if you want to change it!
Kirstie