Hi I pinned my left delt this past saturday morning 10/14/12. It was the first time in this delt. I have a red circle forming about the size of the whole delt. PIP is the same as my other delt that i did last week for the first time, which is pretty sore. It is light red with no bumps as of right now. Should I be worried or can this be a normal reaction that can pass. Or is this pretty much a definite infection or something else and I need to see a doctor?