ADHD Testing?

I've got a question.

I've been diagnosed with autism about 2 years ago (I'm 23 now), and at that time, I intended to be tested for ADHD as well. But the psychologist said to me that it wouldn't make much difference as I've already been diagnosed with autism, so then I didn't continue with it as the process for my autism diagnosis was so long (took about a year altogether I think).

I wanted to ask if it would be of any benefit to get a diagnosis for adhd? I really struggle with daily life and recently been seeing a lot of symptoms I can relate to which I didn't know were even part of ADHD. 

On a side note, I also get people saying to me that autism isn't even real, so then I feel like I'm already making all this stuff up in my head UnamusedUnamused