Published on 12, July, 2020
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Hi and welcome to the community!
The NAS some excellent resources covering the whole process - I think you might find them very helpful :)
The first bunch that I'll link to directly includes:
NAS - Assessment and diagnosis
There are also separate sets of articles covering before diagnosis and after diagnosis, all available via the diagnosis hub:
NAS - Diagnosis hub
Waiting times for assessments vary by NHS trust, but are typically years rather than months. If you're in England and would prefer a shorter waiting time, then you might prefer to ask your GP to re-refer you to an NHS-approved private provider via Right to Choose (RTC):
NAS - What is Right to Choose
This website (among others) offers a list of RTC providers for autism assessments:
ADHD and ASD assessment – Right To Choose
thank you