Things like Dinah's experience happen, luckily not that often. You have to do what makes you feel comfortable, and no one anywhere on the internet, this message board, etc., who is not your doctor can give you medical advice that is absolute, without examining you and having the proper qualifications to do so properly. You now will have to decide if you desire a second opinion from someone else with a different perspective than your first doctor. Please do not rely on this site or any other web source for the answers to your problem. The best that any can do, is offer you suggestions or a new line of thought you might not have considered. And even with the good intentions of people that have been through the experience, most that post here and elsewhere are not doctors, and there is the potential for misinformation to be dispensed. If you have doubts, or if further treatments as I suggested above do not resolve your problem, have your doctor refer you to an associate for another opinion and possibly a new direction. You have not been through all the possible tests that would have disclosed something like dinah's...a cervical CT scan etc. A fine needle biopsy of the node would be relatively painless and inexpensive, and you could get results back in just a few days. You also didn't mention if the node was sore. Nodes that are the drainage sites for infections usually are fairly tender when touched. Perhaps you want to look into that if further treatment does not produce results. Obviously any medical condition which does not resolve needs to be examined in further detail until finite answers or resolution are yours and it goes away completely. We see too many misdiagnosis of OC when prescriptions of antibiotics continue for too long a period without complete resolution of the problem. It happens, even in the best institutions. Medicine is like a puzzle, you really don't get the whole picture without examining lots of pieces of the puzzle first. Each examiner of the puzzle looks at it from a different perspective and with different tools. Pick a specialist with a different background, and different experience base if you decide to pursue this. But for sure, you should not live with a sore thoat for months and months without knowing why.