I think several people have raised a point that I'd really agree with...
It took me ages to get used to the fact that I was going to have a "vampire" like existence for a few weeks..
I wanted to be awake in the day and asleep at night because that's what I was used to and what the rest of the world was doing..it did feel very very lonely being awake all night by myself..and it felt like it was going to last for EVER!
Everything seems worse at night. But if you gear up for the night having somehow stocked up some sleep during the day and expecting NOT to sleep all night at least you are prepared a bit..
of course it's hard to sleep while your baby is screaming and that's what proves that you are a good and loving mother because those cries are programmed to distress you and make you come running..
I used to during teh day take DD's out in the pram for a long walk and then leave them sleeping in the hall and try and sleep myself.
If I couldn't sleep I would at least lie down and try and watch tv, anything to stop the brain madly ticking over..
I also found it hard to sleep during my "slots" before the next feed. I found if girls were sleeping I'd force myself to read a few pages of a book - it at least distracted my brain a little..it is horrible the feeling that you will be woken up suddenly but once you accept that it will get easier..
completely agree with co-sleeping at this stage being useful too...at least you are lying down and your baby can see you/smell you/feel near to you which will help him settle...
I really really believed that my children would NEVER EVER sleep and this phase would never ever end - but it will! I am sat here now with two 2.6 year olds who sleep through every night! Try to focus on the immediate minute and not the future which should help your feeelings stop spiralling out of control into blind panic and anxiety..
Hope you can manage to get some sleep soon - is there anyone who can come and help you both? My Dh slept in the spare room at nights with earplugs in and then helped out during teh day - it was hard at the time but at least having one of you who had had some sleep really helped reduce the rows...your brain is much more programmed to hear cries as well so he should be able to switch off better than you and get some sleep..