From Longman Dictionary of Contemporary Englishcrisis of consciencecrisis of consciencea situation in which someone feels worried or uncomfortable because they have done something which they think is wrong or immoral → crisis
Examples from the Corpus
crisis of conscience• It struck me that the practice of Thaipusam should not seem that mystifying for anyone who endures a crisis of conscience.• Hereford might just have a crisis of conscience tomorrow.• A comparison of the two will throw light on the crisis of conscience on both occasions.• The crisis of conscience and duty would be too painful. 