cat may have mated last night

I have an appointment to get her spayed next week but she got out last night and may have mated. Can she still be spayed and will it take care of an unwanted pregnancy? 

Yes. The implantation takes a few days anyways. She will be fine to be spayed next week.

Yes, she can still be spayed. It takes a few days for the sperm to reach the eggs and then implant in her womb so she may not be pregnant yet. Even if she is, just a few days pregnant won't make any difference to her spay surgery.

Thank you for being a responsible owner.