I recognise the Depression, Anxiety, Paranoia, Psychosis sequence. I would also add in guilt, sometimes guilt feeds the paranoia and sometimes paranoia feeds the guilt.

My mood is swinging from low to rock bottom at the moment, my last downswing was characterised by excessive guilt, the one before that paranoia and the one before that hallucinations.

I don't know whether age has made paranoia or anxiety worse for me or whether I just didn't recognise those particular symptoms as well when I was younger.