I've been seeing my for about 5 years and get cancelled on quite a lot. He gets sick very easily and so misses a lot of work. But he gave me the number I can call to get straight to his phone and will call me back as soon as possible. I can also call that number after hours to avoid having to talk to the on call therapist who I usually don't like. He checks his messages at least once a night and calls me back.

Jbug