I will tell you what I did, & hope it helps.
I don't what to tell you what to do 
My DDs father left me when I was 7 months pregnant after 10 years together.
I was in complete shock, then gave birth on my own and then we went home.
She screamed, I couldn't put her down.
It was awful, really really hard.
I only tried her in her cot for ONE night as I just couldn't cope with the screaming in the day & then at night.
My mood was very very low as well.
I got a bed guard for toddlers and put that on my bed (her side)
I kept her in with me every night, it was better for my mental health. I didn't have to get out of bed, I was utterly exhausted mentally & physically.
Would you consider that? She might settle being next to you, maybe that is what she needs.
My DD was in a sling most of the day as well, as she was so bloody 'high needs'
I remember the very low points OP, I really do.
I had quite instrusive thoughts, anxiety, all sorts going on.
But I took it minute by minute, day by day, forget text book babies!
You do need to speak to someone as well, health visitor or G.P.
Also I used to give DD porridge in the evening, and warm milk, to settle her.
Best of luck, please take care & you will both get through this OP 