Pushing 70 and feel great physically and emotionally. Inexplicably, I had what can only be described as a panic attack

Came down with covid for the 4th time. Just the usual symptoms, nothing like the first time. I still needed to recover and had much time to think and read. I was reading more about what to expect regarding aging in the 7th decade when a terrible sudden feeling of dread came over me. Couldn’t breathe. Scary as hell. Got up, walked around the house and then a bit outside. Returned to my normal state after about 10 mins. Hoping this isn’t going to be the start of something. Been 5 days since it happened and feeling like my old self , but it’s hard to just forget how horrifying it felt