That said, there are a number of signs or thought patterns that undiagnosed autistic people may be able to relate to.

"Many autistic adults experience ongoing challenges with sensory sensitivities, such as discomfort with bright lights, loud sounds, certain textures, or visually overwhelming environments," she said.

There is also a huge focus on the external signs and not so much the internal symptoms of autism, Gardner-Wright said. And those internal symptoms are very different from person to person. “There are ...