Hello
We have several children all grown up and they were a dream to look after and only really cried when unwell
Our grandchildren, several of them were all like their parents.
When I used to read stories like yours I'd think, WTH, get on with it. THat is until we had our latest grandchild a few months back. Boy did he cry and cry and cry and worst of all cried even more at night time, We felt we'd spoilt him as myself, my OH, our son's MiL and some aunts all live within 15 mins walking distance had got our grandson spolit EG only sleep with cuddles.
It drove our DiL to exhaustion and our son had 4 weeks off to help but come work again, no one could sleep I the house properly - we were advised he'd grow our of it and low and behold, at around 12 weeks, it changed almost overnight, ie cried a lot less. We'd had our baby grandson checked out by docs/etc several times and apart from the common straightforward fixes there was nothing to worry about - Our son and DiL do say they are lucky to have us close by and we don't work as we sold our shop years ago and very early retired so have time on our hands
It's never wrong to seek medical advice from doc/hospital/midwife /clinic etc to ensure all is well and never hurts to ask immediate family/parents for help as it is hard and very tiring work bringing up a baby that cries at night and day and can drive anyone to despair - SO, please act
Re baby exhausted, its a vicious circle is what we found as the more bay cries the worse and worn out baby gets and cries even more - so get help as recommended by me and look after yourself so you can look after your baby.
Make sure your ferritin etc is all good
Btw - a good percentage of babies cry like yours but you need rest as well so ask your husband for more support as well as family and or as suggested above
Take care and good luck