My life is about to turn 360

To make the story short, my husband of 10 years cheated on me last year 2 times different ladies and different thing happen for some it might not be cheating but for me it's 100%. First ladyhe went out to movies two times and they kissed, I caugh him texting her that he misses her and she misses him and he told me everything I spok to her too. We all agree that they will stop contacting each other, 6 months later I find a sex text with another lady. I told him it's the last time and that I don't want him to contact either of them... Fast forward till yesterday I find out that he is snapchating with both ... One has BFF and one BF status which mean that they are the people he most talk to. I co fronted him about it and he said he has enough of me. We are talking divorce ...I'm devastating we have a 2 year old and a 2 month old baby . How am I going to function ? Should I just leave ? Give him another chance ? Am I overacting ?