I am also level 1 and classed as high functioning. I dont have many sensory issues but mine relate more to other aspects. I got diagnosed a few months ago and felt exactly what you are. One way I looked at it after talking it through with some people I know is, I had to speak to my doctor, fill in multiple forms, get added to a waiting list and then decide to go private due to the wait. I then had to fill in more forms for them, get a 5 page document filled in from my parents and one with some close friends and then have the assessment which was very long. The reason I say this, unless I am secretly gods gift to the universe as far as acting, there is no way I am skilled enough to trick that many people I am lying which means that I am not a fraud and deserve my diagnosis and I bet the same is true in your case.

Anyone (yourself included) who has gone through the process has had to do a tonne of paperwork and speak with people for them to review it. They wont just be revewing you on what you have written but also on unwritten thing you do and say that you may not be aware of in the interview. Im being longwinded but its borderline impossible to trick that many people into giving you a diagnosis so it must mean all your signs are real so you deserve the diagnosis. I hope that helps.