Sebaceous cyst. Until i get it removed!

I have a sebaceous cyst on the  chest wall. It suddenly appeared on 36th week of pregnancy. We did a USG and found that infected sebaceous cyst in the subcutaneous plane in mid line of the anterior chest wall (2.8 X 1.8cm). My doctor prescribed antibiotics for three days. The pain was gone for a week. . My doctor advised to remove it after few days of delivery. Now I am on 39th week. I am feeling the pain again and the place seems reddish and painful and bigger. Should i worry abt it now. Unable to sleep peacefully with the pain. This is my second pregnancy. First was normal delivery. Due is on may 26. Will this cause any complications in my delivery or breast feeding. I am waiting for a healthy baby to come out. Please help, how to deal with this pain until I get it removed