Recently Neurologist asked me if I thought I could have autism. To be honest I never really thought about it since my symptoms never started until about 3 years ago. Is it possible to become autistic in adulthood? She also asked if I had ever been exposed to heavy metals?? Im guessing heavy metals cause autism or something similar to autism?

Anyone here ever been actually diagnosed as autism in late adulthood? If so can you please share what symptoms you showed?