I have been sick with fever, yellow mucus, coughing, sore throat and now my fever has broken. However, I have tiny blisters on the back of my throat and the front of my neck hurts and appears to be swollen. This has been going on for two days now. I do not have any lumps and I do not have tonsils. The neck pain does not go away when I take ibuprofen or use ice packs. What could be wrong?