I am the same way. Ever since having COVID in late 2020 before the vaccine I have been so dizzy that walking is tough and impossible without a cane or walker. I had all kinds of tests as well, checking for MS and a variety of other ailments determined by spinal tap. I have had all kinds of therapy including specialized balance therapy and I am not any better. I tried antihistamines and may be saw some brief, short-term benefits, but now it doesn't help. I am going to an ENT sometime soon and have hope that will at least identify the problem. Please keep us informed of anything you find that helps. I hate this way of living.

I went to ENT and even neurology specialist.still the same. No cure at all. I have a hard time showering in the toilet. I can't be in any small corner because it will worsen the sensation of being dragged
to one side, rocking, swaying just like a coconut or a palm tree and it is a 24/7 thing. Sleeping is even worse. Felt like I am riding a roller coaster to sleep every night or riding a rocket but blasting to my left up 😂 (This is so funny and weird) up to the space or sleeping on a moving car or speed train or bus (The speed is quite fast) but always moving to my left 😅 .My body is moving uncontrollably 24/7.my brain is always sending wrong signal 😔 I am so tired. I can't even sleep in my bedroom. I have to sleep in the living room (big area) for a year half now! Sometimes the sensation makes me really nausea, gonna fall or pass out anytime + fatigue. If I need to walk longer distance I will need to depend on my wheel chair. Starting, I can't even walk at all but depending on wheelchair but now I can walk like a short distance.I train myself to balancing and walking. A very tough journey! The sensation will get worse if I lay down on bed or lay on my back or on something like the wall, chair or couch.I really dont know what to do....
When I sleep I need to sleep with many pillows and lay on my back. Sleeping side ways was impossible for me. Sleeping with 1 or 2 pillows is also a no no for me. My head felt weird if I look up, down,left or right and when I jump.I felt soo like a disabled. I can't work. I didn't work for like a year and a half now. 😭 This is a torture. Inhuman torture! After Covid the fatigue is real! I have never ever felt so exhausted just by walking a very short distance or doing like a simple chore 😵coping with the sensation. I am going crazy soon!

See an ENT that specializes in balance problems.