@Psychoticbreak sorry to hear that you are still struggling. I think if you didn't knowingly enter a combined ASD and ADHD assessment (as in, you only went for an ADHD assessment) I'd be confused, too. I know you've talked about the practitioners being very good / well known, but if it were me I'd still be confused and I'd ask for a post diagnostic discussion with them.
I've not been aware of anyone going for a single assessment and getting a diagnosis of both. It is, however, very common to be diagnosed with one and then referred for the other with details of traits in the report. I've said before - as have others - that processing takes time. All of us, however, at least had the benefit of knowing we were being assessed for ASD, and already had thoughts that we were likely Autistic.
For what it's worth, I know we've discussed a few things on here and I think I'm right in saying that you have identified that you have some similarities with us (as in other Autistic women) on here, so I'd take comfort in that (as in you aren't an imposter)
Maybe some therapy is needed in order to help you process this. I don't like the way adults are diagnosed and then just left to get on with it. I'd also imagine that from what you say about having other things going on, that this will be having an impact on you being able to process and accept your diagnosis.
As always, sorry for the long message. I hope it makes sense.