That's incredibly hard! I really feel for you hon. So, what about strategies to trigger memories. Large notecard--- it has either a single phrase or word. You work with that notecard over and over at home. Someone can help you if you have a supportive family. They ask you a question and you scan your note card at your lead in, ques, trigger statements.
I wonder how much nerves play a role here too. That can make me freeze. My son has great anxiety and a developmental delay that involves his brain processing. When nervous, he blanks out. You could do this as well . . . create on your chrome book, lap top or whatever a presentation on yourself. Then have your que card for any questions after???? If they are aware, they may allow this.
Deep breathing before had may help a little. Valium. ha, but something to that makes you calm? My son is very calm and mentally organized when he's had physical activity prior. That sounds weird but part of his treatment is what they call 'heavy work' in the occupational therapy world. He does push ups, wall push ups, stomps his feet on a hard surface, gets tight squeezes, does a crab walk and really any physical exercise and it is calming and organizing of his thought.
I commend you for your desire to have a job that fits what you can do --- we just have to get you over the interview hump to get there!