Great job turning around your thoughts and doing something good for your body by exercising!

I'm wondering if you've talked with your T about the feelings of dread - they seem important to address. The question of pacing is definitely a joint conversation too. I imagine that most T's would try to err on the side of caution when it comes to bringing up difficult topics. They might rely more on you to bring them up when you feel you're ready.

In the meantime, having your T work with you on coping skills and bringing your anxiety down to a more manageable level seems like a good place to start. I know it's scary, and the telling can be difficult.