I thought I was the only one! I really did not know that this is something that happens more often.
My mother managed to convince her psychiatrist to diagnose me with autism when I was 13. He told me that I had autism and that if I did not get treated, I would be alone forever and I would never be able to make friends. He also called it a handicap. No treatment was started, there was no help or anything after that. The psychiatrist told me and I never saw him again. My mother told everyone around her I was autistic and they all felt very bad for her, including me. I felt really sad she had me for a daughter and I hated myself for being who I was. I also was bullied in school and I thought it was my own fault because I was autistic and therefore I did stuff that made others bully me. I was the one in the wrong and it was just a response to that, I felt.
Turns out I am not autistic at all. Like, I had it checked out thoroughly and there was no doubt about it. I actually an able to emphasise with others better than average etc. I also have some really close friends, which I made once I was able to leave home. I do have CPTSD though from severe emotional neglect and psychological abuse.
It is so weird to see similar stories here. I know my social skills are fine, but I still feel insecure about my social functioning. I am always looking for stuff I might do wrong that confirms that I am autistic after all. I also still feel like something is fundamentally wrong with me and as if my existence is somehow an enormous burden for others. (This is not how I feel about autistic people, but it is how I was made to feel about myself by that diagnosis.) It is a feeling that is very difficult to change.