Drowning. Looking to learn from others here

Hi everyone,

Hope you are all safe and healthy. My husband is suffering from mental illness. It has been tough. It probably started in a mild form about a year ago, but he strongly resisted any help offered to him. He started believing his thoughts very very firmly. Initially I used to challenge his thoughts and try and show him perhaps a more positive view. However, we would invariably end up in fights and he would dismiss my view. His condition got so severe that he had to leave the country in fear that he was being tracked, phone calls were being tapped, his career was destroyed etc.

I honestly have felt numb, helpless, stuck. I could not agree with him, couldn't challenge him beyond a point, and he wouldn't agree to seeking help. Therefore the last 6-8 months have been very challenging. I feel depressed, stuck and I feel like I get sucked into his thoughts during situations. At times there are decisions to be made and he wants to take charge because of his mind set. So we're dealing with very cryptic communication, multiple email addresses (basically trying to hide). Certainly ones personality also plays a role in how difficult situations are handled. I'm looking to understand what are some coping strategies for carers, specifically in cases where you're caring for someone who has delusional disorder (persecutary type).
We are currently setting up appointments for my spouse to see a GP and a mental health plan. Any advice around how to navigate this process?
I feel a sense of relief knowing I can pen my thoughts here and learn from others experiences.
Positivity and strength to all, Thank you