Neck lain and granular pharyngitis.

I used to be a smoker since last 3 years (3-4cigarettes per day) and I had throat irritation since last 40 days and i have left smoking 1 month ago. I met many general physicians all of them gave me antibiotics but i still had throat irritation. Then i decided to meet an ent specialist in delhi who disgnosed my throat using endoscopy rod and showed me that there are red lines in my larynx part (dilated blood vessels) and showed me there were small bumps in my throat area which he told is granular pharyngitis which might be due to excess antibiotics and Laryngopharyngal Reflux and suggested me just to take 1 tablet for acidity and 1 multivitamin and asked me to do warm salt water gargle nothing else because I've already taken many medicines and assured me it's not much serious. But I am still feeling neck stiffness and pain also little headache. What could be the reason and what else can i do to get better faster. Kindly let me know the possible reason and solution for this pain.