Why do people think I am autistic? Is it in my chart?

There's nothing wrong with you. You're living your life to the beat of your own drum and with all those Aquarius placements, I'm not surprised. I don't know how old you are, but I think that this boils down to an old-fashioned case of peer pressure. It gets better and as I have gotten older, I have learned to embrace my Aquarius placements. It gives an intellectual edge that many of the other signs do not have.