I have a chronic red & sore throat, and some fatigue, but no fever, tests were ok, ve tried antibiotics, & i eat healthy, please can u advice of poss causes?

Allergies: These might be a sign of chronic allergic rhinitis (hay fever) and postnasal drip causing the red and sore throat. Chronic seasonal allergies raise histamine levels which explain some of your symptoms. I suggest trying over the counter clarithin or Allegra to see if it helps. Also doing a saline nasal rinse would help as well. If not, see an otolaryngologist (ENT) specialist.