Hi Tabi... You need to push... You've waited long enough. You also need to see an ENT who is very familiar with base of tongue cancer (oral cancer period)

It is very possible this is thyroid related, however depending on your age it could also be HPV + BOT cancer - ear pain, difficulty swallowing, nodal involvement and a lesion... You've waited Long enough. Call the place where you are booked to have the scan tell them you are very concerned (terrified) ask to be put on a cancellation list. Then call your ENT or or even ask your GP to refer to to another ENT - who can get you in sooner - the lesion needs to be biopsied.. Scan or no scan.

Hugs - it's probably nothing but you need to hear that sooner than later.