My first shot of winny was last wednesday in my left bicep. I decided to shoot eod. Well now it is monday and my bicep is still in pain. I injected friday into my left pec and yesterday into my right pec. My left pec is fine and right one is a little sore but nothing like my bicep. how come my bicep hurts so much? I didn't massage it as I did my chest. Could that be the problem?