Red inflamed throat, pain swallowing, green mucus and postnasal drip, ear congestion, no fever, no pus on tonsils. Went away came back week later?

Infection. It may be a sinus infection or only allergy related. I would see a physician.
Sounds like a virus. You are describing a upper respiratory infection. Many of these can last several weeks before your feel normal. It is also possible that you have caught a second one. Try some OTC sinus medication for the pressure and postnasal drip. See a doctor if things worsen.