Can someone please provide an explanation what Guanfacine is supposed to do for LT Covid and also Naltrexone?

Right now I am suffering from severe off the chart anxiety/depression since Covid, weight plummeted down to 89 lbs, I'm trembling and can't even rest or sleep because if I do and close my eyes, my body/mind goes into a 'flight or fight" mode and jolts me up. It's horrible!

I'm on Zoloft and it's not helping at all. My symptoms are extremely worsening since onset of Covid in '21 (I believe I had a case prior but wasn't tested) and I have no support and Docs here in Wisconsin don't have a clue how to even treat this. I'm so very scared and alone.

I was recently told at Mayo I have a groin hernia but they can't do the surgery due to my current weak condition and weight.