Desperate for Answers: Chronic Facial Pain Taking Over My Life

I have had pain in my face for years and no one can find the answer. I've been to dentist, doctor, and ENT. It hurts on my left side from my top jaw up. Especially on the left side of my nose. The pain can be from 1-10. It's literally like a migraine in my face. I'm begging and praying someone knows what this is. It hurts so bad sometimes to the point I'm sobbing and curled into a ball. I take Emitrex whenever it starts so it hasn't hurt that bad in a while since I've been on it. I can go months without it hurting but it also can hurt for weeks. If anyone knows what this is please help me.