Worst day of my life.....

First off I apologize if this post kinda seems scattered. My mind still can't quite wrap around what had happened. So recently my SO of 3 years broke up. But we got back together and we were going to work on our relationship and get back together. Well yesterday I found out that he has been hanging out with and taking another chick to and from work in MY car! And here's the kicker. They've been having sex. BUT she's fucking 7 months pregnant with ANOTHER man's baby!!!!!! I just don't understand any of this. I gave that man everything. I gave him my all! And it wasn't good enough. I loved him and stuck up for him when noone else would. I stuck with him through his snorting pills problem. Which apparently never stopped. He just hid it better from me. Why would a man chose to do this to his family?! We have a 1 yo little girl and a 7 yo boy. So yesterday when I confronted him about the cheating he snapped. He went off of the deep end. Yelling screaming and hitting things. He called me and told me I had to get all of our stuff out that night! I panicked. There is no way I would be able to do that! My stuff plus all of the kids stuff!! WTF! So I go there and start packing stuff. He starts yelling and hitting things again. So I go to leave. I make it to my car. He yells at me to leave my phone that he pays for them. I told him no. I would pay for my phone. Well that pissed him off even more. He ran down the steps. I was in my car so I quickly put it in reverse. He grabbed my car door and opened it. With all of his strength he held onto it. So I hit the gas to go faster. He let go. As I was putting my car in drive. He picked up handfuls r of rocks. Big driveway gravel. And threw them. They hit me in the face. But worst of all the hit the kids! My 7 yo got hit pretty bad because he was closest. The baby got hit also. I started screaming at him stop that he hit the kids. I drove down to the end of the driveway and called the cops. While I was on the phone with them he's jumping up and down yelling and screaming then he finally ran inside. So the cops finally get there. And they take my statement and look over the kids. And look at my car door and fender. They try to talk to my ex. But he won't come out. And they said there not going to make a huge deal about it and potentially make it worse then it already is. One of the cops came up to me and asked if I knew anything about him stealing gas. I'm like what?! The cop then tells me that they have him on camera stealing gas in MY car!!!! So the help me tie my car door shut and I leave. I get a call from my ex's mom asking what happened. And I told her. Well I guess he told her a completely different story! She thinks I'm in the wrong for calling the police. And wanna know why she feels I'm in the wrong?? Because he's on probation and more then likely go to jail!! He told her I said to him that he will never see his kids again. Lies! I honestly can't believe any of this has happened. I'm so lost and so deeply hurt. And I know this is going to sound awful of me but I hope some day he feels the pain he put me and the kids through!! I hate him. I hate what he has done. Why wasn't I? good enough for him?? Why am I not good enough for someone to give all of there love to?? 😭😭😭.