I agree if you need to call your T go for it. I rarely call my current T only because she rarely calls back. If I need to talk between sessions I email only because the communication between office staff and T is less than ideal. If its an immediate need and I need to talk to someone right away I can always talk with the nurse she is great.

My old T I could call and leave him voice mails and it eventually he would call me back. It would sometimes be a few hours but I knew that eventually he would get back with me. I miss that. But that is another post.

If your T has said you can call between sessions and you feel that talking with him/her would help then go for it imho.

Jbug