Good for you! Even a tiny bit of talking about the hard stuff is progress.

I definitely think you should tell T that it was a good idea and helped. They won't know what is or isn't working unless you say so. I give my T feedback all the time...either right there in session (I'll flat out tell her "this isn't helping" or "thank you, that was helpful"), or in an email after the fact (I tend to give details about what worked and what didn't) or in the next session.

T and I have never tossed balls, but I do find that doing something with my hands makes it easier for me to talk. When I'm really stuck, T will ask me for "one true thing" and we build up from there.

If your T allows emails, you could just email and tell T "thank you, tossing the ball was very helpful." If t doesn't allow emails, you could say the same thing at the start of the next session. You don't have to go in to a lot of detail...a thanks is enough.