Looking for a bit of advice.

Had tests done last wednesday, won’t go into what..
Results were a nightmare to chase up, but finally today I had the news that the tests were clear.

A hour later I’ve had four missed called off the nurse, and a voicemail asking to call back before 1:30. I missed that deadline and have to call back at 9:30 tomorrow morning.

The voicemail said not too worry and to call back before 1:30
should I be worried ?
I am a mess right now.