Breath.... Inhale count to 5, exhale slowly through your nose and count back from 5.
You don't know what it is, no use stressing yourself out with speculation.
You may not be the only 1 looking for him, so his phone is not attractive right now, its a nuisance actually. Emails are quieter and calmer...
Go meet him and listen to what he has to say, then take it from there