I experience some discontenting left shoulder/back pain. I just turned 17 this month and am terrified of an early death.
One day I was sick about two weeks ago, and I started to experience a pressure/dull ache in my back just down and right of my left shoulderblade. This pain/pressure has been causing havoc upon me ever since. Since then, it has moved to my left arm, back of left side of neck, left side of chest, and left upper side. This pain is now only present once again in the one spot below and to the right of my left shoulderblade. However, this pain seems to be a come-and-go pain. It appears to come for 10 minutes, and be gone for 10, then repeats this process. Also here recently, I have been experiencing very minor nausea that does not last long, and I also occasionally have been experiencing a fatigued/sickly feeling. My mother also smokes and I think I may have done quite a bit of second-hand smoking in my lifetime, but I haven't breathed in any smoke in at least a year. I don't understand what's going on, but I believe that some of this stuff may be made up in my head because of my extreme anxiety towards it.
I had concluded for a little while that I must have some kind of cancer. However, my mother disagrees and thinks it's just a pain from slinging my backpack on that spot and causing a pulled muscle or damage to a nerve. I don't know what to think, but I'm extremely scared and need any help I can get. I do not have health insurance and can't afford to pay any medical bills right now, so I am asking for advice here!
Thank you.