At end of chapter 14, what does the doctor tell Hester to do about Dimmesdale?

Chillingworth suggests that Hester's one act of adultery has spawned evil that will last forever, first through Pearl, and now in Chillingworth's relentless attempts to punish her and Dimmesdale. Hester accepts her role in the sin, but she cannot accept this perpetuity of evil. She actually will be vindicated upon Dimmesdale's confession, when the black flower will lose its power and slowly shrivel, giving way to new, unfettered life.