Stopping notifications on discussions

Michel • Married 4-25-14, son arrived 7/6/15, daughter arrived 3/15/18!
How do I stop receiving notifications on certain discussions? I made the mistake of replying to someone's comment on the Abortion discussion and now anytime anyone posts a new thread I get notified. I have been getting 5+ notifications per day on just that topic and I want to stop receiving them. How would I do that?