There is a very long diagnostic ‘test’ online that you can do, 3 of us took it last year, GD we know had Asperger tendencies and is having treatment for that, DD1 and I were interested in our results, she had no tendencies at all, I have a few (I knew this) .
However if you are talking about going down the NHS route to get a diagnosis, then I think that it might take years to even get an appointment and then I’m not sure what you will achieve.
Maybe take the online test and then read all you can on the subject and see if there are any ways that you can help yourself? A diagnosis won’t treat the problem but it might help you to understand why you might feel ‘different’.