Husband got a girl pregnant when i left him and we ended up back together.?

She was a dancer he met when I refused to talk to him. Long story. She ended up pregnant. I split from the guy I had been seeing and he split from her (me and my husband did not split for other people) we are just young and its a long story. But we ended up back together and married after a lot of marriage counseling. She is giving the baby up and my husband does not want involved said he would pay suport etc but that was it (I do not agree with that) but this isn't an issue being its being adoptef she has cut contact and its possible itz not his (she has multiple babysfathers and was sleeping w/ other people) but I am now pregnant and feel guilty bc of the other child. Everyone tells me I need to just worry about my family and be happy but I can't fight this feeling. We are excited about the baby it will be our last and our relatinship and stability are finally on the right track but I dobt know if I should feel guilty about this or just let it go???