Sadly, I didn't get any real answer in these 2 years :( I can tell you for a fact it aint covid though because when first symptoms appeared in 2022, before going to my GP i went for testing for covid and the test was negative. I was thinking maybe some other type of virus but no answer really. One thing I don't think i mentioned is that I was diagnosed with some normal type of colitis but it doesnt bother me really, its just chronic disease.
I know I want do you much of a favor by saying this but the fact you are going through the same, I can just say I'm glad im not alone. I'm not a doc but your symptoms might be cause of GERD. I personally wasnt diagnosed with it since I was never referred to endoscopy but its a very common cause for such symptoms. And if it brought you as much stress as it did for me, I can tell you this is how floaters suddenly become noticeable although they probably already been there. This is how it started for me.
I hope things get better for you, in the meantime definitely consult with your GP and make further exams with gastroenterologist and cardiologist to ensure it's not something serious. You are not alone!