It could be overwhelming when you try to do it all at once, and when one tries to heal trauma, slow and steady wins the race. You can talk to your T about your reactions after the sessions exactly like you talk about it here and explain to her what the problem is, and she should help you find ways to process your emotional material safely without getting overwhelmed. May be, you and she could talk about various things you can do every day that would help you keep yourself in balance first before you proceed with talking about traumatic material. Once you get stable, you can process your emotional baggage further, but slowly, one step at a time. If your T has a solid understanding of how trauma operates in the body, she should know all that.