Trouble In Paradise

Okay, so I hope that no body gets the wrong impression from this post. I love my daughter I really really do. I am just finally having a break down. Sadie is almost a year old, and she is still an extremely hard baby. Thankfully for those who have watched her, she has been good. Than again, it makes me wonder, even more why she acts this way with me. People have said, "you just need to put her down so she can cry it out". Trust me I have done this....always. There have been days when she will literally cry for hours at a time, because I have to get things done. She really will cry for hours. No exaggeration. You would think after a while her throat would start to hurt, or that she would realize she is fine. Yet, she does not. Instead she just goes on and on, and on. We thought it would get better when she started crawling, but that has not happened. Instead of being content crawling around, she just follows me and cries. So in Some aspects it is even harder. Where I could get a moment of peace before, that is harder to get. Sadie will crawl into the room, I am in sit down, rock, and cry. Food will sometimes calm her down. That unfortunately is not always the case. I was so blessed with Sydney. She was such an easy baby. I think that has been the hardest part. I have done nothing different, so I am confused as to why Sadie is this way. Sadie will cry until I hold her, and the moment I do if I sit down she freaks out. Her crying literally takes everything out of me. My housework, and being a good wife has gone down hill. By the time I have a minute without her, I just want to relax. Doing household chores is that much harder with a screaming child. Doing things one handed is fine, but it takes 10x longer. Jeff can be so patient with her. But I don't think he fully gets the extent of the toll her crying does to me. It is sad, but Sydney will now tell Sadie to stop crying. She even gets annoyed with it. I am so lucky to have a healthy baby. I love that I can make everything better. But lately it has been especially hard. Has anyone ever experienced this? Any tips on how to deal with this better. I know I can handle this, I have been doing it since the nurses handed her to me. The nurses even said " you have a princess on your hands". I guess I should have headed the warning, but I guess I was holding onto hope that was not the case. I love Sadie so much, and I want to be the best mom I can. I need to figure out how to handle this better. Any tips would be much appreciated!! Sadie does have her good days, but those seem to come few and in between.