I am worried sick, a few weeks ago I was massaging my neck and I discovered a lump on the bottom area of my neck to the right. It's roughly pee sized and you can't see it bulging from the skin. I'm pretty sure It has only just popped up as I would have felt it. I thought at first it was a swollen lymph or even a injury from the gym (the barbell does hurt the back of my not neck sometimes) but it hasn't gone down so I went to the drs and he has fast tracked me to ENT, he said it's only small and doesn't think it's too much concern but given the fact it's a lump on my neck he doesn't want to take any chances. 
 

long story short, I've had tightness of the neck for year on and off, but seem to have had little to no issues with it in the past 5 years. I've also had pains in my arms which they couldn't seem to fathom why ( I got steroids off a cruise a ship dr and it went) but recently these pains and unusual sensations have started to make an appearance again! I'm also fatigued and often get quite hot in the night. Im 33, don't smoke or drink much and I'm in pretty good shape. I am absolutely terrified! :(