Small lump between my clavicle and shoulder just above armpit crease. its about the size of a pencil eraser, no pain unsure if moves or not?

Small lump: Good description. Most likely benign. But to be as sure as possible, go see your Family Doc. Check out http://www.webmd.com/melanoma-skin-cancer/abcds-of-melanoma-skin-cancer for ABCDEs of melanoma skin cancers.

Lump: It may be a lymph node or cyst or a small mass in the tail of your breast. I would go in for an exam and possible imaging like an ultrasound or mammogram.