Thanks for all your insight here in this thread. I went through all this myself and haven't really been able to talk about it. Its reassuring to see others have been through the same. My psychopath convinced everyone I had psychosis when I questioned her once. I refused to believe something that I saw her do was a 'hallucination'. For months I was gaslighted by everyone I knew. I would think I was in the clear and then a friend would call me up at work out of the blue, asking if they can take me to accident and emergency. I had 9 months depression and am only now getting out of it.
It is insane how memories can be overwritten. I can write at length on this, I learnt it from videoing her talking to me. They have total frame control and will keep switching subjects away from facts.
I never confronted her to tell her that I knew who she was, but she did warn me indirectly. She showed the 'psychopath face', if that means anything to anyone...