Yesterday was the weirdest thing for me, I had a headache , sore throat & fatigue I slept all day & was still tried & my body was killing me. Why?

I also had hot flashes. And I would feel like I was coming down with a cold but nothing happened really. Today it calm down but why did that happen it's like a had a fever for a bit and it went away. Right now but back still hurts but not as much and I still have a headache but not as bad, & my eyes burn but not as bad as yesterday what's going on with my body. & I'll feel a little nauseous but didn't throw up? What's going on?
Yesterday was the weirdest thing for me, I had a headache , sore throat & fatigue I slept all day & was still tried & my body was killing me. Why?
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