a couple weeks ago I had an infection in my tooth, they dentist wont see me even though my ob wrote…

a couple weeks ago I had an infection in my tooth, they dentist wont see me even though my ob wrote a letter giving permission. I think the infection came back no matter how much tyenol i take it still hurts and this headache wont go away. what should i do? i slept al day today literally all day and barely ate.