Welcome to the forum, Wormy!
In your case, if possible I would also go to a professional and ask for an assessment - I’d also add, from personal experience, if you can - also ask them why they came to their conclusion.
I was diagnosed with high functioning autism at 17 years old, but it was kept from me (by my mum, due to other ‘Big’ stuff going on at the time) for 10 years. When I found out, it did feel like a relief to me (I was bullied at school and made to feel different. I knew I was, but couldn’t understand why I was never accepted regardless), but I have always questioned it to a degree. Some things make sense, others don’t.
But, like you, I still almost always get high scores on the autism spectrum indicator tests. I just wish I could have actually discussed it with the psychologist I got taken to see, so I could be more informed.