Welcome, Giselle.
Anyone who treats other forum members decently is welcome here!
If you were diagnosed as a child, then it is likely that you are somewhere on the autistic spectrum, as it is a lifelong condition, and often more easily diagnosed before we have learned to "pretend to be normal". There is always a chance of misdiagnosis, of course, but that is true of any condition. If you hang around here for a while, I think you will soon get a feel for whether your life experiences are typical of other people on the spectrum, and that will put you in a better place to decide if you want to get a more formal second opinion or not.
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When you are fighting an invisible monster, first throw a bucket of paint over it.