I am so sorry for all your suffering. I, too, have been sick with long covid since 2020. Sounds like could be wrongful firing since you had physician note. I don't have any answers for you, as I have many problems myself that have no cure (mostly blood, heart, lung related, but also shortness of breath, fatigue, migraines). I've spent hundreds on supplements. The only thing that has helped is nicotine gum (couldn't tolerate patches due to adhesive), but even though it's supposed to remove spike proteins (and maybe it does; I've read conflicting studies) it's likely just the energy from a stimulant. Good luck and know you're not alone.