Trouble breast feeding :( Please help!?

I'm really sorry your having so much trouble and unfortunately I don't have an helpful answer as you are doing everything the nurses are telling you and going to all the right classes but I do want to say a massive WELL DONE for continuing to try and even attempting to breast feed as so many people don't. I luckily didn't have the problems you said but still found it tremendously hard (nobody tells you how hard and tiring it is). But I wouldn't have changed it for the world and like you said the bond you get is amazing and it is so rewarding. But if there comes a point when you do find you can't continue do not feel bad, just remember you tried your best and gave your baby the best start. The only advice I have is I was told when I was breastfeeding not to worry about your milk drying up, it will keep coming as long as you keep feeding baby or using a pump. Good luck