Hello. Ive been suffering from a sore throat for about 4 months now. It started when I began taking corticosteroids for my weed allergies. I have taken them before without issues and allergies never caused my throat to be sore. A crater shaped white ulcer began forming on my right tonsil and it had white puss exudate. I visited a doctor that sent me to a throat and nose doctor. He said it's not cancer and that I am completely healthy - said there is nothing even abnormal there. Still, my sore throat has only gotten worse and the ulcer spread, also forming on my left tonsil. A dentist prescribed me sumamed (azithromycin) for Plaut-Vincent's angina, I took it for 6 days and after a week after the last pill, while the ulcers look less bulky, the pain is the same or worse. The pain is constant, sometimes hardly noticeable and sometimes very debilitating. I have trouble swallowing, speaking and breathing in deep. I'm getting desperate for answers and it's seriously negatively impacting my quality of life. What could the problem be?