Hello thimotea: I see this is your first post here on PC. Welcome to Psych Central.

You asked what you should do regarding your mental health concerns. The simple answer, I believe, is to see a mental health professional... perhaps a psychologist or a mental health therapist to begin with. And then, if medication seems to be warranted, you might also see a psychiatrist.

You mentioned you've been shut in for many years. While I'm not completely shut in, I am mostly solitary. And I do know, from personal experience, that being cut off from society has a way of working on your mental health (& not necessarily in a good way.)

You also mentioned feeling as though you're halfway to schizophrenia. So here's a link to an article, from Psych Central's archives, on that subject. And then here are links to 3 additional articles that, while they may not relate to your situation specifically, may (hopefully) be of help with gaining some perspective regarding what you are experiencing:

Schizophrenia Guide: Symptoms, Treatment & More | Psych Central

Psychotic Depression

Coming to Terms with Your Delusions

Possible To Come Out of Psychotic State Without Medication? - Ask the Therapist

I hope you find PC to be of benefit.