I had a testical infection recently and got checked out and nothing was wrong.Today I feel a slight like pinching pain, and when I go to the bathroom I see that there is a lump/sore (like small pimple) on my scrotum near my penis shaft. After pulling on a hair I noticed that it could just be the hair somehow got stuck for a few hours somehow and pulled on it. Will check tomorrow, pulled on the hair and like a white head and a little blood came out. Should I be worried?