Has anyone got a diagnosis without prior history of using mental health services?

Hi. What are your experiences with a UK adult diagnosis, did you need to have any of the 4 factors below?

I have done months of obsessive research and self-reflection and know that I'm autistic. I want a diagnosis, but having read the English guidance for GPs, I see that they will not just look at all my traits like I expected, but also whether I've had:

1. "Problems in obtaining or sustaining employment or education.
2. Difficulties in initiating or sustaining social relationships.
3. Previous or current contact with mental health or learning disability services.
4. A history of a neurodevelopment condition or mental disorder."

The thing is, 3 would have applied to me if I had sought help previously for depression, anxiety and OCD, but I never did. (I do have probs with 1 and 2, but not enough to concern a GP.) Now I'm worried that my disinclination for seeking help in the past will create a barrier now that I'm finally asking for some.

Does anyone know anything about this? 

Thanks!