Hi cophfe. Welcome to Psych Central. I am sorry you are struggling with whether you have autism or not. Some people say Einstein had autism or was on the spectrum, so intelligence may not be a negative indicator. How much is this condition disrupting your life? Maybe talking about it to others when not sure if you suffer from it is more of a problem than just living with it. If it is disruptive a professional can help.
These resources may be of interest
Autism Overview - What Is It? Is There a Test for It? | Psych Central