Where to get an assessment for neurodivergence (ADHD, etc)

Hey everyone. Any tips or advice on where to go, or who to talk to about getting an assessment for ADHD and/or other neurodivergence?

I've been noticing more and more that I can't focus and I'm easily distracted, etc. It's becoming a problem. A co-worker even asked if I was neurodivergent or ADHD. I feel like I'm ADHD, but I don't know for sure.

My doctor told me that an assessment costs thousands of dollars, so I'm looking at options.