Have Been In Bed For The Last 3 An Half

Have been in bed for the last 3 an half day with temperature, shivering, freezing.
My teeth and head aches that it wakes me up at night. I feel weak.
I have been taking amoxicillin. I was hoping to feel better by now.
Sometimes the food I eat, shortly after I have swallowed it, it hurts right in the middle of my chest.