My bellybutton is really sore and purple and red inside its been 2weeks since my gallbladder surgery there is a clear plastic over it so I cant clean it. .

Red. I'm surprised you haven't followed up with your surgeon, yet after having your operation 2 weeks ago. Since another colleague did your operation, I don't feel it is appropriate for me to tell you to remove the plastic dressing so better call him or her ASAP. You may have a wound infection.