Facial pain around sinuses & eyes, tmj pain, minor headache, left side neck pain, foggy head, metallic taste in mouth.

Sinusitis: Your symptoms can be secondary to chronic sinusitis, i suggest you see an alergist.

Multiple symptoms: Unfortunately, your symptoms are not specific and can be seen in a variety of different disorders - sinusitis, migraines, ear disorders. Seeing a doc is essential to arrive to the correct diagnosis.

See Dr. first: Hard to say without an exam and history. Could be sinus, tmj/tmd or a combination. I would see a dr. First to rule out ear/sinus issues.

Many things: Could be many things. Sinus, tmj, metabolic, fibromyalgia. Start by seeing your md and getting a complete examination.