What were you misdiagnosed with instead of autism?

I was adopted and diagnosed with reactive attachment disorder as a kid. Looking back and for many reasons, I’ve been strongly suspecting that what was thought to be adoption issues has always been mild autism. I won’t go through them, but there are so many signs.

I’m seeking a diagnosis, but a little worried. If I got so much attention and scrutiny from mental health providers and underwent so much testing (including some of the assessments used in autism testing), wouldn’t they have caught it?

I know you can’t provide me answers. But I’m wondering if those who got diagnosed as an adult, but who were tested for various issues as children and misdiagnosed with other things can share their stories. What were you misdiagnosed with, which turned out to be autism?