32notout - you have my utmost sympathy and empathy.
Ds was a dreadful sleeper, and DH and I were at the end of our respective tethers. It was bad for our marriage and for our health.
DS wouldn't sleep for more than half an hour during the day, and he would never sleep in his bed - only ever in the pram or in the car seat, and would scream the place down if I ever traied to transfer him from there to his bed.
He would need me to hold his hand/pat him/make soothing noises to actually drop off to sleep in the evening. And he would wake three times a night at least, and be awake for up to 2 hours at a time. All he wanted to do was be awake, occupied, and have our full attention in a lit room. If he didn't have all three of those things, he would scream and scream.
To try and do something positive about it, and feel that I was gaining just a little control, I spoke to the HV about being referred to a sleep clinic, which we were. Sleep clinic gave me loads of suggestions to sleep train him, all of which I tried, and very few of which worked. But at least I felt like I was doing something. I wanted to have the type of reassurance that it would get better, but I soon realised that my baby was not a textbook baby.
I went back to work when he was just over a year old. With huge relctance and distress, we did CC (and I don't want to turn this into a CC thread, I am just saying what we did) and things were immediately better, as he slept through the night. he still woke up for the day at about 5:30 though.
It has got better. He has slept through the night more or less (going to bed at 7/7:30) since he was 2, and lately, he has been getting about 11.5 hours sleep a night. For some odd reason, DH and I have decided to have another baby (I am 6 months pg), and so will have to adjust to having little sleep again. I must be mad.