Mmmmmmm you need help and need to say this to your HV. Also she might give you the contact no for Homestart. They are a charity that help families with children under five.
Remember that your baby will not die of crying. It cries because that is what babies do. The world is new and strange for them and they react to, too much light, too much food, too little food, feeling insecure, being cold, being hot. Etc etc
When you feed him, make sure that he is winded, preferably hear a burp.. Wind is bloody painful for a new baby. Try some gripe water.
An indication of not enough food is becoming sleepy. As long as your baby is putting on weight, they are getting enough food.
So how can you get the little monster off to sleep ? Feed, burb, warm and then wrap him up tightly. ( you can unwrap him when you put him in his cot/ pram.
Then with your feet apart ( and your ear phones in playing your favourite music) bend your knees and rock the little darling up and down. Not side to side. You are exercising your thighs, rock rhythmically. He was rocked fairly violently in your womb and will love it. So don't be afraid of being energetic.
People wil say, oh don't do as they will get used to it, but I used a dummy and a few rocks and then they were asleep. It was preferably to listening to my babies screaming , which I couldn't stand and I was exercising at the same time.
Then when they are asleep ( make sure you have the side down on the cot and slowly ease them in. Warm the spot with a microwaveable hot water bottle first if you can. You don't want a freezing cold spot to wake them up . Also how do you like getting into a cold bed ?
As you ease them in, put your hand on the side of their arms and gently continue rocking them up and down. Then ease your hands off very slowly and creep out.
Then a quick relaxing shower and off to bed yourself.
Also I went out with the pram and walked. It was good for us to be out. Yes you will be dog tired but fresh air does lift our spirits. ( you could just stay at home and drink spirits, but spirits depress you even more)
Best of luck......try and relax as much as you can, as this bit won't last forever. Worrying and anxiety makes things worse. Think of all the babies and mums who have survived this bit and you will both be fine.
Hugs....we have all been there and it's a bugger. I thought what have I done!