Ok I think you're absolutely right Pops about having the Covid-19 virus. You've described exactly how I had it in March.. I thought I had the worst gastic flu ever.. It was horrendous for the first 36 hours, exactly what you describe but with constant whole body shaking like a jelly and freezing cold too.. I won't labour on any more about my symptoms, but I too thought I was going to die, never had anything like it before in my life.
Retrospectively my doctor diagnosed that I'd ''probably '' had the virus... but only after he'd first said it had been flu... ( no flu was ever like this)... but to give him his due at that time it wasn't commonly known that the Covid-19 Virus was causing Gastric problems.. but it became known within a week or 2 after I was stricken..
My o/h went down with the virus 2 days after me, and his symptoms were completely different , he was ill for 16 days.. but with what seemed to be the worst Flu.. he was delirious for 3 days ..again retrospectively diagnosed.
He has recovered fully from the virus.. although he was verrrry poorly.. ... but I haven't. !!

Like you I'm loathe to go to a Hospital, and my Doctor is now away from the surgery and a locum has taken his place... so my only option was to pay for a Private doctor to speak to , and I will be doing that Via a Zoom appt on Thursday to see what next steps we can take.
I have to add I'm not anywhere nearly as poorly as you now, or as I
was .. but I'm left with pain in my back and lower abdomen and a few other things that just won't go away, so I need advice on it.
I feel you have no other choice but to go and see a doctor, or at least speak with one...
Wishing you better very soon my dear friend...