You are right--it's Saturday and he may be deeply engaged in a...workshop or something.... Do you have any healthy coping mechanisms for your anxiety? For me, I do something new to distract me...like visit an art museum or trying a new thrift store--I try and create a happy memory during the anxious time.
Hope you have some to fall back on...and here are some magic words..."It will be alright."
Hoping with you!