Hi futuramamma
just wanted to say that things will get better. I had an awful time with DD, colic and reflux, barely napped in the day. It was exhausting. I constantly felt like I'd made a terrible mistake and couldn't cope. None of my friend's babies were like this. I felt so alone. DD screamed for hours each evening, she screamed when held, screamed when you put her down. If your GP is not supportive, go to another doctor and have a chat. I was put on citalopram to help me cope. Not saying this is necessary for you, but it will certainly help to have a chat with a sympathetic doctor. Do you have a surestart centre near you? They usually have drop ins for weighing, run by a HV, maybe a different one to your own who will be more sympathetic.
Nothing is wrong with you. Anyone would find a relentlessly crying baby difficult, anyone who says otherwise is lying! I found that getting out and about helped. I even used to wander round the metro centre in Gateshead until 9pm whilst I was staying in the area, as DD would be over the worse by that time. I also invested in an amby hammock, which helped settle her, there are always reasonably priced ones on eBay. Try to get out for a couple of hours each day. I know it's difficult and you feel tired, but it will help, I promise.
I know it seems a long way off, but by 12 weeks your baby will be much improved, and you will start to enjoy him. He will smile, gurgle, roll, giggle and you will forget how tough the first few months were.
'this too shall pass'