It could be seriously infected. see a doctor for some antibiotics. I'll say it again, haven't you heard of flesh eating organisms? A niece of mine spent close to $200,000.00 to save her life from it. All due to a piercing gone bad, and in the same area as yours.
It is possible that it is affected. It could also be because you have a sensitive skin and that the healing time could take long. However, you need to make sure that you ensure hygiene and if the situation worsens, it will be important if you seek medical attention. Try and apply surgical spirit after cleaning and see if the redness will clear.