I'm Demondice, but I'm nowhere near as demonic as the name might suggest. 40 years old, and just going through the diagnostic process now as I'm very likely autistic. It's a bit of an anxiety-inducing time as I worry that I'm just imagining the symptoms and I'm wasting everyone's time. However, pretty much everyone I speak to tells me that I'm one of the most obviously autistic people they've ever met and find the concept of me doubting it hilarious.
I felt that way for a long time too but I struggled with the opposite with people not believing I could possibly be autistic. It was a relief to finally get a diagnosis :) I don't think you'll be wasting anyone's time if you ask for an assessment. In fact you'll be saying yourself, your partner, friends and family, a lot of pain and time.