Lost?

I just moved into a new house and a completely different neighborhood and I didn’t want to let my cat outside because we live by a busy street. Yesterday morning, as I was leaving for work she ran outside and I didn’t have to time to go after her so I left really worried. Well its been a full 48 hours since that happened and shes still not back home. I haven’t even seen her at all and She’s done this in the past where we goes away for like 3 days and then comes back. But I’m scared if she got ran over or lost😩