Should I have confronted her immediately?

I have a difficult time with assertiveness. But, I felt strongly about the phone when it happened. So, how should I have said something? What would others have said?

Please let me know what your responses have been had you been in the seat when your NEW, (first meeting), therapist picked up her personal cell phone and answered it and had a private conversation during your session.

It did not last long - a minute or so. But, I don't think that's the point. I think the point is that she took a personal call during my therapy time. And it was our first meeting, which, (I think), is a portent of things to come.

So, how would you all have handled it?

I look forward to your responses, so I can learn from you...
Thanks!

Peace!