I need advice!! Please don't judge me.

I've been staying with my husband for 9years now, we had issues in our relationship,for such a long time we were always fighting, 2018 I decided to cheat on him, I found a guy we fall inlove,love each other like craze, November 2018 I fall pregnant and is not my husband's child, I'm so scared how am I going to break the news to my husband because I'm still staying with him. The baby daddy is so supportive he loves me, our first appointment in 6weeks we went together to the Dr, the next week we going for 12weeks scan.