About a month and a half ago, I noticed a lump in the left side of my neck that was really small. I put it down to the cold I had at the time and left it. Today, I was massaging my neck and I noticed the lump has trebled in size, can actually be seen sticking out of my neck and moves when I touch it but bounces back into place. I recently had blood tests for my thyroid and that came back normal. The doctor I saw today was very dismissive and kept pointing out my blood tests were fine so nothing was wrong with me. I am growing increasingly concerned as the lump only ever seems to be getting bigger. Should I go back and see a doctor that will actually take time to listen to the worries of a 19 year old girl? Should I get a second opinion? And what do you think it is?