re: Flu vaccine and covid

I know this: I got the flu shot for geezers in mid-October of 2019 and it made me sick. Very low grade fever, but mostly just an overall tired and goofy feeling for about 72 hours. It felt like altitude sickness and I live at sea level. It absolutely was depleted oxygen levels in my blood and hence, hypoxia. Never saw a doctor, but the whole manifestation recurred around late February. Again, 2 or 3 days and gone. ???