I ve congestion in nose, watery discharge, headache and itching in eyes and palate for many days. not going by antibiotics. what it could be?

Allergies: Your symptoms could be related to allergies. Consider using an over the counter antihistamine daily as a trial to see if your symptoms improve and make a follow up appointment with your doctor.

Not bacterial: Probably a virus, not a bacterial infection. Antibiotics only treat bacterial infections. See your General Physician for accurate diagnosis and appropriate treatment and medications. Please understand that self-diagnosis and self-medication may be at best ineffective, and at worst harmful. Please see a trained health care practitioner.