This is weird.
I also have a lump on the left side on my neck that seems to change its size every hour and sometimes causes pain. And I also have this pain around my right shoulder - exactly as you described.
Did you find out what's the problem?
It could be your thyroid, have you had it checked? I have some issues with my throat recently and can't get anyone to look into them any further. If you have something confirmed growing in you, you must get it out even if it is benign as they tell you. I don't want anything in me that isn't supposed to be there. If they said you have something don't sit oon it, get it out!!
Most things turn out to be nothing, as you probably read on here, but you still must get checked if you can if just to stop worrying.
My neck has been swelling and I feel like i am slowly choking, I have pain around my sternum. I have a scope in a couple weeks. I'll check back with you and let you know what they said. You sound similar to me. Not everything, but some.