I Am 65, Female. For A Couple Of Weeks I've

I am 65, female. For a couple of weeks I've been fatigued, had some body aches, and what I thought was a sinus infection. Last week I started getting severe stabbing pains in my jaw when I chewed and went to urgent care. I was on prednisone and an antibiotic this past week. Yesterday I started feeling nauseous, my throat feels a little weird, and I'm extremely fatigued. My jaw seems to be better, but acts like it could start hurting again at any moment. My ears are stopped up, and I don't feel well. What's wrong with me?