For about a month or two now I've been having really bad pain in my back and shoulder blades. Pain so bad its becoming difficult to walk.And have had a rapid loss of weight even though I'm not active. And having pain just about all over my stomach and pelvic area. Went to the hospital a few days ago and had blood tests done and a chest x ray done as well and they found nothing wrong except my white cell count is a bit Elevated. I've also had loose stool for about three weeks now and noticed that a few times there was this black color to it. Also have this swollen lump in the left side of my neck that rolls around and some on both my collar bones. I would appreciate if anyone had any answers as to what exactly is going on with me.