Really glad your boyfriend decided to see a doctor!
Continue to be encouraging about it and try to demonstrate patience and understanding!
For symptoms my brother has told me about:
All delusions were worsened by scouring the internet for illegitimate articles written by people who have no clinical authority. Occasionally, I would help him find legitimate clinical articles or official news sources (major news websites or research magazines) that disprove some of the really wacky illegitemate articles he would show me.
Delusions of paranoia - He believed his doctor might be trying to poison him with medication.
Delusions of mass persecution - he believed that people disliked him and displayed it in subtle ways, like honking only at him on the road, or talking bad about him behind his back. He also felt like noises around his apartment were coded messages meant for him.
Delusions of thought-insertion - he believed that other people were planting thoughts in his mind for various bad reasons.
Delusions that he is not ill - He believed that schizophrenia was not a real disorder and that he was receiving special coded messages which he needed to decode.
Delusions that he is invincible because he is already dead - this one didn’t last long, but did cause him some confusion and stress.
Delusions that his hallucinations were ‘astreal projection’, or travelling to an alternate dimension - this was very convincing for him.
Delusions that he had lived past lives - that special wisdom or insight was gained by hallucinating.
Delusions that he might be psychic - also that his hallucinations were predicing the future.
Hallucinations of very morbid things - often disturbing and frightening.
Hallucinations of sexual nature - often out of his control and very difficult to talk about.
Hallucinations that swing from encouraging to insulting quickly - left him doubting who he could trust, even when family was supportive and encouraging.
Hallucinations that demand he perform some action - repetitive and relentless. The demands were often inappropriate, or irrational. Occasionaly they were destructive.
Adversion to personal hygiene - morbid mental images or uncomfortable feelings prevented him from doing simple tasks like clipping toe nails or preparing meals.
Feelings of inadequacy - he was very critical of himself to the point that he occasionally wanted to give up on doing things to help himself all together.
Perceived criticism from family - he felt like there were negative undertones to most things family talked to him about.
All of these symptoms were worst at night. Irregular sleep schedule and lack of daily routine were both symptoms and contributing complications to these problems.
Refusing treatment was often based on the belief that either his doctor was trying to harm him, or that his doctor unwittingly prescribed harmful medication. Both of these things required patient listening to his concerns and gentile reassurance that it wouldn’t make sense for his doctor to do those things (he’d lose his license to practice really fast if he were evil, or stupid).
Refusing to practice good hygiene and clean up his living space was often a result of his disorder creating uncomfortable feelings, or disturbing mental images related to those tasks. These were hard for him to talk about and it took a lot of time building trust before he decided to talk to me about them at all.
So, there can possibly be a lot more struggle going on internally than what you are aware of. Try to be patient and keep building trust by being a good listener amd a good source of rationality and reason.
If he comes to you for a ‘reality check’, be kind and reassure him that the disturbing things he might believe are either impossible, or extremely unlikely.
But also be aware that some of his statements might have some roots in reality.
For example, my brother stated that he didn’t want to drink tap water because it is not very clean and might contribute to some of his health problems. I realized that he was considering buying filtered, bottled water to drink instead.
I told him he was right that bottled water is much cleaner, but his digestive system probably handles tap water perfectly fine. If he really wanted to switch to botted water, he could simply figure the cost into his budget for groceries and replace soda with water.
Not saying that your boyfriend will experience any of that, but these symptoms seem to be pretty common.