Ive been sick for three weeks now. Lots of thick yellow mucous when I cough, post nasal drip, yellow when I blow my nose, sore throat, fever and chills. The flu was negative, strep was negative and I was diagnosed with pneumonia at the urgent care and the Dr. gave me Doxicycline twice a day for 10 days. I followed up with my doctor 3 days later he said I don t have pneumonia but to continue antibiotic since I started it already. He said I have sinusitis and a bad cold virus. I completed the course of antibiotics. He also gave me flonase and azelastine nasal spray and xyzal. I started feeling a little better. Three days after finishing antibiotics the right side of my throat and right ear started really hurting again and the mucous started back up. I looked in the back of my throat today and I noticed a thick, long deep purple vein on the right, painful side. Do I need antibiotics again and what is this? When I went for my follow up the other day my dr said my lungs are clear and at the time I was feeling better. I want this pain to stop.