Feeling so ashamed and conflicted…

I cheated on my husband twice with the same guy and got knocked up…I have two kids and love them more than anything. My husband is the greatest man, does everything for our family, and has always been so good to me. I think I just went into a crisis mood and enjoyed the rebel feeling and the attention this guy was giving me, now I’m dealing with the consequences. My husband has no idea and I am sitting here sick to my stomach what to do. I feel I need to have an abortion and stop this stupid shit I’ve been doing, but I feel like the worst person in the world. My babies are the sweetest and I feel horrible not giving this one a chance, but I can’t deal with the shame of it. I have no one to tell this to so I guess I’m just putting it on here for any advice….