symptons??

Aside from a swollen lump, it's hard to describe thyroid cancer symptoms - and something like 90% of thyroid lumps aren't actually cancer.  

The thyroid is a delicate little organ and sometimes struggles if people with a different type of cancer in the head and neck area - or even some breast cancers - gets treated with radiation that strays to the neck and plays havoc. Even then, it's more likely to cause thyroid problems than actual cancer. It takes a pretty big thyroid lump to start closing your windpipe - mine was 7.5 cm diameter and I told it was pressing on the windpipe. If you don't have a really big lump - just a bit of a swelling - it's very unlikely to be causing your problems.

The docs will get to the bottom of it.

And I won't tell you to talk to your nurse because in thyroid world, we very rarely get assigned such people. I do, however think, that if you're booked for an ultrasound and a tube down your throat you are already doing everything you need to to find out what it is.

Personally, my money wouldn't be betting on thyroid cancer.