Does anyone know where to go for an adult autism test?

So, I've been thinking maybe that I might have autism. I have a friend who's autistic and she's recommended I get tested if I think I do too. I don't feel like going into any of my symptoms and such. I just wanna know if there's any place in Houston that can diagnose autism in adults.

I've searched for it myself, but there's a lot of different things that come up. And a lot are for children mainly.

Any help here would be greatly appreciated.