Sorry for the long post.....

So I know this is for our April due date group, but I need some advice from other mothers and expectant mothers at that. My husband and I have been together 5 years total. Married for almost 2. We have a 4 year old and I’m expecting our second little girl. We had a rough start to our relationship and I almost lost him due to a car accident. We got married young and I already know everyone will say something about that, but as our friends and family said we have always had a more mature and serious relationship. We right before I found out I was pregnant we went through a really rough patch and I almost filed for divorce. He was going out partying, drinking, doing drugs, and was in and out of me and our daughters life and home for over 2 months. He even got physically abusive towards me...well once I found out I was pregnant things went back to normal and he went back to himself. I was put on bed rest and told I couldn’t work due to previous miscarriages and our daughter being born early. Well the past 3 months he has been going out once a week, sometimes more. And I don’t mean just going out with a friend. I mean partying and doing drugs. Such as cocaine and pills, he doesn’t know I know about he drug use. When he goes out he goes with his sister who influences so much negative behavior on him and our marriage, he will just not come home from work, or leave to go do something and not come back then come stumbling in the door at 3/4 in the morning. I don’t have any trust left for him and at this point I want to leave him. I just don’t know how I can or will. I have no way to provide for my daughter and I since I can’t work and even if I could no one would hire me with less then 10 weeks to go. I mentally feel like I’m not good enough, I wonder everyday if I’m being cheated on. He lies to me 24/7 and when I catch him in a lie he tries to cover with another lie. He’s just not the man I married anymore. My heart is completely broken. I will be crying with frustration and my 4 year old will hug me and tell me she loves me and how I’m such a good mom. I just hate having her see me like this and I know this isn’t good for my pregnancy. I just feel stuck. I want out but I feel like I can’t. We currently live in an apartment owned by my parents so I know rent wouldn’t be an issue. My parents wouldn’t make me pay, but everything else. I have no clue. I just want him gone and out of my life and I know it’s not that easy being married and having kids. I just need advice😔 all I want to do is cry and I know I’m getting further into my depression everyday. 😥