Bad pain in left nostril, way up. Pain in upper teeth, all the way to left ear. No congestion. "popping" pain in left nostril. N. Fowleri?

2 consults. Please see both Dentist to evaluate tooth pain and ENT specialist to evaluate sinus/nose/ear issues. You need to be seen by doctors, not by a computer.
Sinus problem. Sounds like maxillary sinusitis. See oral surgeon or ENT doc for evaluation/treatment.
If you had a. Naegleria fowleri infection you would be too sick to write in. Sx's usually begin within 2 to 15 days of exposure & may include sudden fever, severe headache, neck stiffness, nausea / vomiting, light sensitivity, feeling tired, confusion, loss of balance, hallucinations, seizures & death.