I wonder if maybe it would be easier if you started with exposure to resources that were designed to reassure people? I have a lot of medical anxiety, too, and I think that watching dramatic shows about surgeries and other potentially painful procedures would maybe be a bit overwhelming. And I think they are a little misleading in a way, because most of the time when you go to the doctor, you are just going for a checkup or for advice about a minor ailment. Lots of us can go decades without needing surgery.

Maybe you could try starting with kids' videos and books that are designed to make children less afraid of going to the doctor? Youtube seems to have a few helpful videos, and they have the advantage of being really short. I do not know if there's anything like that for adults but maybe your therapist could help you find some more reassuring resources.

I also found that yoga was super-helpful in making me less afraid of medical things. Partly because it helps with relaxation in itself. And it also made me feel more in touch with my body and more in control of myself. Going there was a form of exposure therapy for me because in the beginning the classes raised similar feelings as going to the doctor did, and as I went I could see that it was all working out ok and I really enjoyed it.