So sad

So I know this has nothing to do w pregnancy but I need to vent bc I have no one else...so I just recently found out at 6 this am my husband has been cheating on me for a week now w this girl he use to date a while back...we already have 3 kids together and I'm pregnant w our 4th..idk wether to abort the baby or to keep? He's saying he's sorry and wants to still be w me but I don't want that..do I bring a innocent baby into the world and take care of it even if my husband and I aren't together or do I just abort it and move on? I'm 6 weeks pregnant btw and has had a abortion b4 earlier this year 😔😔😔😥😥😥