What is Proctor willing to do at the end of Act 2 in The Crucible by Arthur Miller?

In "The Crucible" by Arthur Miller, at the end of Act 2, Proctor is in a dire situation as he becomes implicated in the witch trials. He is willing to testify against Abigail Williams and expose her false accusations, even if it means damaging his reputation and social standing. However, he initially hesitates to do so, fearing the personal and communal consequences that may follow. It is only after Mary Warren's confession that Proctor decides to reveal the truth, knowing that he must act in the face of injustice even if it means sacrificing his name.