Seems long but labs can get backed up I agree to wait until next Monday and call to make sure they are on their way. Are you thinking it will be low? Are you having symptoms of something?
This really depends on the lab. Lots of labs are really behind because of covid. If you're in a high covid area, it wouldn't be surprising that they're taking a long time.
If they aren't back by Monday, though, I'd have the doctor's office call to make sure they aren't lost. In normal times, it shouldn't take this long.