Go and see your GP and tell ask him to refer you for councilng regarding your abusive relationships. I was depressed when I went to see my GP and was referred but the waiting list was a bit of a wait tbh. I was lucky enough to be able to afford to go private.
We discussed lots of things, my poor relationship with both my parents, why I choose these men. Sometimes we choose them as deep down it's all we feel we deserve. When I left my worst abudive ex I thought my heart would explode in my chest. Seriously. I could feel actual pain.
What you have to do now is dry your tears, put your shoulders back, chin up and carry the fuck on.
Put your kids first, focus on them. Then focus on yourself. I started running when my dd was asleep as we had to move in to my dgm. I hated running. I was fat. But it did fuckng wonders for my mind space and health.
Shortly after we split I started dating a fuckng wanker that had a live in partner and three kids (two youngest ones I'd met) he also was fucking his brothers gf. We were with each other 6/7 months. Did I know about his other life ? Did I fuck. Oh how I cried tears for that cunt. He proper drew me in. My dd thought he was awsome.
Thing is - he could have been Jack the Ripper and I still would have got with him. My mind/esteem/soul had been really damaged previously so I would have settled for any fucker with a nice smile. I was vulnerable and needy- and that actually put my dd in danger. (She was fine but it could have been a different story)
Talkng to some one proffetional was like a light bulb coming on. I looked at myself, really looked at myself. I was broken buscuits at that point.
Spend time healing. Real time. I gave myself a year. Promised myself no men for 12 months. I read lots of feminism book, positive vibes ones.
I met dp about 18 months after my self imposed ban. For me it was supposed to be just friends - didn't expect a relationship but he grew on me 
He really is the missing part of my jigsaw. Good people do exists.
Sorry for epic post 