For the past two weeks my 10 month old DS has been waking at midnight/1am and then crying for at least two hours. I usually go into him after 5/10 minutes of crying and do pick up/put down (which we use successfully for naps during the day) but it doesn't work at all - he just screams harder and harder every time I put him down. I've tried introducing a comforter but he's not interested. He also screams if we try to co-sleep. Leaving him also doesn't seem to work - just more screams. Basically as soon as we put him down he screams - and even when we hold him he cries.
Eventually after two hours of us all becoming increasingly desperate (and trying everything, from rocking to singing to walking up and down) he'll fall asleep on us.
Does anyone have any advice? I just feel exhausted and so frustrated with it all, I feel like the world's worst mother at the moment.