Up until a few weeks ago ds was a very happy energetic independent little boy, pottering about playing with his toys, screeching with delight, laughing at everything, just seemed to be really really happy.
He's obviously been more needy when tired, teeth, cold etc. but in the last few weeks he's literally just been crying constantly. Food, calpol, playing,distraction, going out in the buggy etc. etc. NOTHINg helps, if I try to put him donw he screams and screams. Also if dh hands him over to me he screams in despair (gutted he seems to be doing the same thing that happened with dd developing some sort of aversion to me, if dh is near and I'm with him he just screams and thrashes about to get to DH, dd did this too, 
clearly i'm doing something wrong).
When it's just me as it is on a Monday and Tuesday he cries the whole time, won't let me put him down. DD 4 is with us too, she doesn't get any input as all my energies are spent on trying to stop him crying and screaming. I feel anxious and desperate myself, it's making me very snappy and short tempered with everyone at home. He's bloody hard work tbh and on occassion I have ended up just putting him down in his cot going into another room and crying my eyes out.
Tonight, he was desperately tired at 6.30, couldn't bath him as he screamed to be picked up and dh is still with him now trying to settle him. he's been screaming non stop from 7 apart from when one of us is holding him. This is a babay who until a few weeks ago could be put down awake quite happily and would gurgle himself to sleep.
He was making good word sounds and things but all he does now is scream. it's got to the point where i dread him waking up as I hate looking after him. I know this is mean but I do, it's depressing demoralising and exhausting.
The two things that have happened in the last 2 weeks are him going to nursery 3 days a week (where he's absolutely fine, no crying) and me going back to work. DH says he's ok when it's just dh dd and ds but when i come in from work like tonight the screaming starts. people have even commented on how distressed he seems sometimes when I'm trying to comfort him.
What the F**k is wrong??! And what am I doing wrong?? And how can I sort this?