i work as a nanny and carry for lont periods of time the baby who is almost 2 years, i carry him mostly with my left arm, a couple of months ago i noticed that my left side at the base of my neck on top of the clavicle is swollen, not swollen node but that small area if i lay down you cant notice that also my left shoulder and omoplato area feels sore, and the joint of that left arm with the shoulder make sound and its sometimes painful, im really so worried have no insurance, and sometimes think this is cancer, can you please help me?