Talk to Cancer Specialist / Oncologist on Lymph Nodes On Neck

I am lymph nodes in my neck on both sides from 20 days, I visited doctor right after I felt it and he said you have sore throat and I had cough as well, I went to another doctor and he said the same but I had no pain during swallowing but had cough,I had taken antibiotics for 3 days,1 week later I went to another doctor, he checked it and said maybe your swelling had reduced but you have still redness in throat is have taken 5 days amoxiclav 625mg and lymph nodes reduced a bit but not completely reduced and I don't have cough now, it's been a week that I have no cough but I still feel lymph nodes in my neck 2,3 small soft on right side and 1 flat on left side, I am very worried but the doctor said it's not an issue