Morning after pill ? unsure to take or not please help?

Ok just. To say i am not a teen i am married with 3 children already however my husband had a vasectomy in September and we not yet had the all clear we had a accident last night we got carried away. Now my last pregnancy nearly ended our marriage so we don't want another . The thing is i am so against the morning after pill should i take it and in against what i believe. To protect my marriage or should i wait and see if i am pregnant