Desperate for an answer 😞

So me and my SO just got back together from taking some time apart just 1 month into us getting back together we find out the he has a baby on the way with someone else ...

im so depressed at this point and i dont know what to do or how to deal with it.

I told him i dont want to know anything about that baby and i know its not the babys fault but ive been told before by my husband that if i were to ever get pregnant by someone else he wouldnt even consider about taking me back so why should i accept this baby ?

Iam i right for doing this ? Any tips or advice on what i can do ? 😞😞 we have been together for 6 years and have 3 kids together ... and honestly i dont want to give up on my marriage anymore 💔