Hi Friday,
Sorry you're going through this... I've gone through it too.
I was born in Europe but my family immigrated when I was in elementary school to a country that's beautiful and very beloved but has a terrible medical/ health care system where sort of similar to the US, you're screwed if you don't have private insurance.
In my early 20s all the trauma of my childhood started spewing out and it was beyond obvious that I needed a lot of trauma therapy, including inpatient trauma therapy to survive, because otherwise I'd simply suicide.
In this incredibly difficult situation, I made the decision to move back to my country of birth by myself. I was in my early 20s, in a state of suicidal, desperate meltdown, almost peniless and with no support system in my country of origin.
With a LOT of hurdles and struggles, I managed tho. I found a way to enrol in university there, in a course I didn't even want to study but which was easy to get into, because that provided me with health insurance. I got a room to live in a university dorm. I never studied at that university. Instead I organised inpatient trauma therapy and outpatient trauma therapy for myself. Eventually I got my own subsidised appartment and applied for Disability Pension.
People thought I was nuts to move halfway across the world "simply" to have access to adequate health care. But at the time, I literally knew that my life depended on it.
In the country without adequate medical care, I initially saw my GP, then saw a psychiatrist, found a therapist who I had to pay for myself (tho unfortunately no trauma therapists available) and tried to find an inpatient treatment. At age 21, I was shocked to learn that this country had NO voluntary inpatient program AT ALL. Like, none. All they had was inpatient facilities where people were put against their will, if they were "a danger to others or society". So basically stuff like acutely psychotic and violent.
I remember going to the ER begging for help, because I couldn't work out where else to go. I even rang a police station once (in a calm, regulated state) to ask them where people are supposed to go when they are acutely suicidal, because I was unable to work out where to go. The police officer matter of factly explained that yes, this country has NO facilities for this. Either you go to the ER, get some benzo's to calm down and work out a way to survive... Or you don't. Simple as that. If you want to kill yourself, you're free to do that.
At that point I realised that I HAD to move to my country of birth to survive, because there I had access to "proper" health care.
I'm wondering whether you can do something similar? Find some "premise" on which to go the UK or Canada for a while like enrolling in university. And once you have health care there, if you "happen" to get sick a couple of weeks later... Well, then so be it?