Welcome on PC Brown Owl
I agree with Leah regarding sharing your doubts with your therapist... Then you could see if she can accommodate to your needs or if you would prefer someone else. My therapist asks me from time to time if I prefer her talking more or less and she listens and try to accommodate. If something doesn't work, I tell her about it and usually she doesn't do the same "mistake" twice.
When it comes to being triggered by therapy... Yeah, it happens to me too and too often but I've realized that after some months it started getting better... And my therapist said that there it isn't possible that I won't be triggered and that it will happen from time to time, hopefully less often in the future but for this reason we have to work on coping skills and what to do if it happens...
I hope that you'll be able to talk about all your concerns with your therapist... Good luck