Hi everyone
I had a high needs baby (DS1 - he's now 4.3!). Pretty much as OP - couldn't put him down, screamed in the cot/pram/bouncy chair/changing mat...turned out he had severe reflux which he is still being treated for today.
He didn't sleep through until he was 3 and even now he has a lot of nightmares and night terrors. I just wish I'd given up earlier and co-slept with him. I lost so much sleep trying to get him to sleep in his cot and in his room.
However, he is the most loving and rewarding child ever! He is always giving us hugs and kisses and snuggling up to us. Far more than DS2 (although DS2 cries less, doesn't throw up and is a better sleeper though still wakes up loads so swings and roundabouts
)
DS1 started walking at 10 months, and he now he talks all day long and is curious about everything (currently, why we can't see the planet venus in the daytime and why the moon moves).
He was a lot of hard work in the early years, and to be fair is still quite hard work but he is very very rewarding.
Hang in there, it does get a lot easier.
We found that by the time DS2 arrived, DS1 had gotten so much easier, that DS2 added no extra work to how it'd been with just DS1.
Also, the love that DS1 had for me in the early days (anyone else find that the high needs baby only wants mummy?! I was dead on my feet!) has now been multiplied out to daddy, grandparents and his little brother. It is soooo sweet how much he loves his little brother.