Welcome to WP MsAnon.
Members of WP are not qualified to "diagnose" anyone else here on the site so we could not tell if you were on the Spectrum or not. Having said that, it sounds to me like you were assessed by very qualified people. I think if I were you I would trust their assessments. You also mentioned that you had a lot of intervention and help along the way especially when you were a very little child. I am sure that has really made a difference in your symptoms. So if it were me, I would probably trust in the diagnoses. You could always get diagnosed again if you felt you needed to be but if you are managing in your life I should think that it's not necessary.
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"I'm bad and that's good. I'll never be good and that's not bad. There's no one I'd rather be than me."
Wreck It Ralph