Long Hauler Worsening Symptoms and Doctors are Stumped

So the TLDR is I(And a very solid portion of my battalion) developed obvious covid symptoms simultaneously in December of 2019. Since then I have had "long covid" symptoms that have increased steadily in severity, which are listed below:

• Shortness of breath, I would say my current lung capacity is half of what it was prior to 2019 on the best of days for no obvious reason, and it gets worse every year.
• Swelling, discoloration(Turn a purplish color), and pain in hands and feet that worsens depending on how much trouble I am having breathing that day
• Dizziness and blurred vision
• Chest pain
• Confusion(IE endlessly forgetting what I am doing), brain fog, and very heightened anxiety
• General weakness. I have gone from running 3 miles a day and a regular workout routine to only being able to walk around the neighborhood on good days over the course of 3 years. It effectively ended my military career and threatens my day-to-day ability to take care of myself and maintain my career.
• Extreme fatigue, on days where I can sleep it can be as much as 16 hours a day. On days where the irritation is especially bad I can't sleep at all, just endless "cold sweats".

These symptoms increase or decrease day by day and are directly related to how my breathing is. I have been given multiple CT scans and Xrays that show no real issues(Links can be given to the results on request unless I can post them here). Pulmonary function tests, stress tests, sleep apnea tests, etc have been given to me ad nauseum with zero helpful results. I have been put on inhalers but they made me significantly worse, basically anything that has to do with putting things in my lungs irritates them.

Is there any direction, like scans or anything, that I can take or am I basically SOL until it finally takes me out via heartattack? I have had zero luck with any relief. Is oxygen the way to go?