The primary issue has always been autism
My daughter and I had a good chat yesterday. She said that the primary issue is, and always has been , the autism - rather than severe mental illness . That it should've been picked up on a long time before it was. She doesn't deny that I have some degree of mental illness , but that it's secondary to the autism , and the effects of it worsened by failure to spot the autism much earlier. She confirmed that she was the one who mentioned autism at my 1st psych appointment here in Wiltshire, not me.
Certainly I've not had the cognitive decline that often occurs with a psychosis spectrum disorder. I've had cognitive strengths and weaknesses from as far back as I can remember. If the weaknesses have got worse, it's a big 'if', then its an expected age related, rather than illness, related thing.