You know what I would say and DO say in my marriage therapy?
"Things always get so heated during counseling and I get so overwhelmed that I can't think clearly."
Stop the spinning. Tell the therapist that you need it to slow down so that you can be heard and your thoughts can be clear. Take a breath. If you feel that you are overwhelmed at that moment, with such an important question - your therapist needs to pause and let you gather your thoughts.
You're paying them for this service - get the help you need and get your statements out! The time there is too valuable to waste if you're not being helped too!