False equivalency. You're either pregnant or you're not - there's no spectrum to it. It's not a good comparison, as someone else in the comments humorously pointed out.
Autism spectrum disorder is as the name suggests a spectrum, a lot of people are from a medical standpoint very mildly autistic - research on the biological underpinning of autism is still in the very early stages so we're not sure what the physical difference is where we can say 'if you lack this' or 'if this is malformed' or 'if this bit is like that' so the diagnostic determination is simply 'do you seem to fit somewhere in the spectrum' - maybe we'll find that there is a gradient of autistic severity linked to something like diminished function of a regulatory hormone somewhere and that indeed these people have a few percent diminished function and that correlates to slightly autistic behavior traits. We might likewise find that there is a fairly simple on/off trigger which these people have but which due to the structure of other brain features doesn't result in pronounced behavior.
This doesn't jive with the diagnostic criteria for autism. You have to have life long social deficits and restrictive, repetitive behaviors in order to be considered autistic. If everyone met that criteria, there wouldn't be a need to distinguish autistic individuals from allistic ones. You might identify with some of the individual symptoms of autism, but that doesn't make you autistic.
I'm having a related problem but with ADHD. I'm experiencing many traits and symptoms of it but I don't know if it's a co-morbidity or symptom overlap.