I am doing a running training plan and am on week 6, went for a run earlier, did 5 mins, walk, 11 mins, walk, 5 mins, then whiel I was walking I got a sharp stabbing pain around my left collarbone that spread up my neck and along to my shoulder. I was finding it difficult to catch my breath but my sports bra is a lettle tight so thats normal.
My neck feels a bit stiff now on that side like I have pulled it, but I was just running, only carrying a tiny mp3 (size of an aa battery) in a wrist pouch.
Any thoughts? Advice?