Pearl is missing

We let Pearl the cat out yesterday for a little while so she could start getting used to being outside. And she disappeared and has not come back yet. I've been driving around the neighborhood today and talking to lots of neighbors. I'm pretty mad at myself for letting her out. I guess I should have kept her inside for a bit longer until she she knew it was her home. We just don't have good luck with cats. She has a collar with tags so I'm hoping someone will find her and call. I'm pretty down about the whole thing.