I've been in a very similar situation. It is horrifying. I would recommend finding a new therapist ASAP. Even if they don't end up being the perfect long-term fit...you need to find someone that can help you process this. And you need to find someone soon. Of course, that is just my opinion and it's what helped me...but it might not feel right for you. Maybe a support group is another option.

The bottom line is that you have been deeply re-traumatized and you will need help to get through it. Please know you are not alone and that this is absolutely NOT your fault! Your therapist was negligent.

Be kind and patient with yourself. This won't be easy, but you can do it.