As Of Last Week, I Started To Feel A Bit

Question: As of last week, I started to feel a bit dizzy and lightheadness with the sudden onset of what felt like an anxiety attack. I took it easy the rest of the night and for the next few days I felt pretty good with the exception of what felt like constant pressure around the back of my head, temples, and below my ears. On Thursday (yesterday), I had another bout of dizziness after going for a run, and I then had a full on panic/anxiety attack where my arms went numb and my mind was racing with feelings of impending doom etc. I panicked and called an ambulance and they took an ekg which appeared fine. I had my parents drive me to the ER just in case and they did a CT scan, chest Xray, and bloodwork with all appearing normal (somewhat low relative lymphocytes). I do have a history of hypothyrodism, but my levels looked normal and this really only happened last week. I'm wondering if the sudden onset of something like MS or even something like COVID could cause these symptoms (I'm a bit of a hypchondriac). I have no allergies nor any history of anxiety. I'm 29, healthy, and I exercise regularly. My most lingering symptoms seem to be slight dizziness and pressure around my temples and ears (almost like I'm stuffy, but my nose is clear).