I'd worry about swallowing them or something if I slipped them back on and slept at all. I've been in your situation and waited until Monday, but mine didn't hurt really.

Seems surprising multiple crowns fell off that quickly. Even if there was some user error (e.g., chewing sticky candy) it seems they should last longer than a day. I'd start wondering if my dentist was doing a good job.

Not a dentist, so probably not perfect advice.