SHALLOW BREATHING AND BREATHLESSNESS.

I HAD COVID IN 2022 MARCH JUST AFTER A WEEK OF HAVING COVID , IN A INSTANT IN EVENING WHILE SITTING ON MY DESK I FELT AS IF I AM NOT ABLE TO BREATHE PROPERLY, AND FEELING BREATHLESS AS IF I HAVE RAN TOO MUCH AND FELT AS IF I AM BREATHING RAPIDLY AND TAKING VERY SHALLOW BREATHS AND IT HAS BEEN LIKE THAT EVER SINCE, I HAVE HAD X-RAYS DONE OF MY CHEST AND VISITED MANY CHEST DOCTORS BUT THEY SAY MY LUNGS ARE FINE, AND RECENTLY I VISITED A BRAIN DOCTOR AND SAYS THAT IT COULD BE DUE TO INFLAMMATION IN MY BRAIN, AS I ALSO HAVE SYMPTOMS SUCH AS CONSTANT CONFUSION, FATIGUE AND FEELS LIKE I HAVE FEVER EVEN THOUGH I DON'T, HEAVY HEAD CONSTANTLY AND PAIN WHICH COMES AND GOES  ALSO MY IMMUNITY HAS GONE DOWN AND I VERY EASILY CATCH INFECTIONS AND PARTICULARLY I AM DEPRESSED BY MY BREATHING PROBLEM. WHAT IS WRONG WITH ME PLZ TEL ME CAN IT BE DUE TO MY BRAIN?