Children who are easily distracted, sensitive to light, and oversensitive to normal touching could be hypersensitive. This infographic from a child behavioral issues center in Cincinnati has more information on sensory disorders and their symptoms.
ASDs are "spectrum disorders." That means ASDs affect each person in different ways, and can range from very mild to severe. People with ASDs share some similar symptoms, such as problems with social interaction. But there are differences in when the symptoms start, how severe they are, and the exact nature of the symptoms. -- cdc.gov #autism
This is an excellent guide!!!!! I am a big advocate of early intervention. If you are concerned at all that your child might be on the spectrum, don't wait and see what happens, seek help, therapies etc