Can Recurring Tonsillitis Lead To Parathyroid Cancer?

Had swollen glands / tonsilitus ever since I was a child on a regular basis, also had glandular fever when I was 19, I am now 36. Had a scan on my throat last October which showed quite a few swollen lymph nodes and am impression, whatever that means? My throat is still sore some days and there is one swollne lymph node that I can still feel. I have since been referred to an ENT specialist who wants to test the parathyroid gland for hyperparathyrodism. I am worried out of my mind as I think I have a swollen nodule, I have got an appointment for a parathroid scan less than 2 weeks after my appointment with the specialist, although she said she didn t think it was serious and the swollen lymph node was soft. I have read a lot online about cancerous lymph nodes and paraphyroid cancer. I have always been thirsty all my life, I drink a ridiculous amount of water and recently have to urinate more frequently and for a longer period of time. I have had stomach problems most of my life too, nearly ten years ago I had food poisioning and I ended up losing 6 pints of blood and having a blood tranfusion. If I had a form of cancer would the doctors tell me / let on?