I am so sorry you have had such a traumatic experience. In my experience, the right therapist can help so much even if they have not been through the same thing as we have. I am wondering if you could google support groups and charities in your area that offer support for burn victims?
Mine is not as extreme but my hair was caught on fire when I was a kid. Not any burns just a lot of my hair was singed off. I didn't really remember being scared of fire. Many years later a guy I knew, who smoked, lite a lighter really close to my face, slightly behind me and I had an instant panic come over me. I realized then that it was fire lighting close to my face caused panic like that in me. But not actual fire. I'm sorry you've had such a traumatic experience, I hope you can open up to more people and begin to heal from it.