It can help get you a speedier call back if you mention in your message the name of whoever referred you to the therapist--an acquaintance, a doctor, your employee assistance program, etc.

I think it's OK to have a T who does his own calls rather than letting the clinic do them. My T handles all his own calls (he's not part of a clinic). One benefit of that is that you don't have to speak to anyone besides your T, no problem with confidentiality, receptionists knowing more than you want them to, etc.

Good luck. That's great you did hear back from one.