**EDIT:
My friend had a baby that cried all the time. She took her daughter to the Doctor. The Doctor looked over her baby REALLY carefully, every inch of her body. It was found, that a blond hair was wrapped around her toe. Barely visible. The hair was getting tighter around her toe. Causing pain. Even the Doctor had a hard time removing the hair because it was so tightly wound onto her baby's toe. Once the hair was removed, the baby was a different baby. All happy. No more crying.
Just sharing this, because, a baby crying like that... seems to be in pain. Or hungry.
Did your Pediatrician consider COLIC?
There is "Hyland's Colic tablets" You can read about it and the reviews on Amazon.
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1) are you producing enough milk?
2) Is he latching on properly?
If not, then he is NOT getting enough intake. Thus always hungry and fussy/crying.
That happened to so many of my friends. Until their baby got enough intake, their baby was never happy.
3) Gas, can also cause crying/fussying. Because gas pains hurt. So use Mylicon Infant Gas Drops. It helps a ton.
4) Babies are just clingy. They need to 'bond' with Mommy. If not, they are not secure.
It is hard... my 1st born was hard.
But she was also very sensory sensitive... even a toilet flushing down the hall, would wake her into a BIG crying ordeal.
5) babies also get very over-stimulated and over-tired, VERY fast and very quickly. Then that causes crying. Because in a baby, 'crying' is also their way to "Shut-Out" stimuli, or when they are tired. It is the only way they can communicate.
Is your Husband helping?
If not, he HAS TO HELP.
It is his baby too and you are his Wife, and his ROLE is to help and be a help. Not a bump on a log.
So, if he is not helping.... tell him to.
It is not a choice. He is a parent now, too.
Even if it is tiring, you need to feed baby on-demand. 24/7, day and night. They need the intake.
And always feed/nurse, before sleep/naps. And when he wakes.
On-demand always.
A hungry baby, will not be happy.
My kids as babies, had GINORMOUS appetites... and I nursed. Sometimes every single hour. It was by their needs.
all the best,
Susan