I want to get better

i have been suffering for 5 months with physical illness. it first started with chest tightness and thinking i was having a heart attack and mow I cant feel the left side of my body. my muscles go in and out. sometimes my throat muscles work and sometimes they dont sometimes my diaphragm muscles work and sometimes they dont. my entire body goes numb and ive had so many test and been to so many doctor and they keep saying they cant find anything. i feel like im not in reality sometimes and no one understands how i feel the doctors keep saying i have anxiety but my body feels wobbly like im on a boat and like im not controlling my body. it feels like my body is sinking and the doctors wont help me. i had a few things happen this year but ive always been able to cope. i moved, 2 deaths in the family, been stuck in the house due to covid. I feel like i have an autoimmune diaease but i havent been diagnosed. Is anyone else feeling any numbness down their left side or entire body. i dont believe its anxiety because its been happening for months. i thought anxiety last for a moment but not EVERY single day for 5 months. what illness do i have ?

I want to let you know that when I was in my 20s the same thing happened to me. I had numbness on both legs in both arms, tingling in both arms and legs and sometimes even in my scalp. Also down my back., eye floaters, I felt like I could not walk straight and I had muscle twitches everywhere, my head had a very weird feeling and i felt like i was not connecting with the world. like spacey. with also chest tightness. I didn’t know what was happening because at this time nobody was using Internet and I literally thought I was the only one in the world with this and I thought I was going to die.! I was terrified.
this went on for over 6 months and The doctors did every test they could and they all came back normal.
fast forward , im now in my 50s and im fine.ALL THOSE symptoms were due to long-term stress and anxiety. The body can only take so much stress before it has a breakdown and that’s what happened. that is most likely what is happening with you. Overtime most of my symptoms diminished but some of them actually have reoccurred numerous times when I am under stress. I realized that they were not going to hurt me but they were just annoying. They actually remind me to slow down and take care of myself! I started to go to counseling for anxiety, I eat healthier and got exercise. My mind eventually cleared up but to be honest whenever I am super anxious I can get that weird head feeling again. But I keep a positive attitude and plow through it all and really work hard to relax myself and it really is a lot better when it’s managed. that weird non-connected feeling is called derealization and it’s very common with stress and anxiety. Not harmful.
anxiety and it’s symptoms can last for a couple days to an entire lifetime if it’s not managed. it can pop up out of nowhere but there’s always an underlying anxiety causing it. That’s why it’s important to get it under control. You can speak with a counselor for that. They see this every single day!
SO you asked what illness you have. We cannot diagnose on this site but everything you have said I can completely relate to so I would say my guess would be unmanaged anxiety and stress. see if you can get some support for this. Take care you’ll be OK.