My dd had the same problems! She was crying all of the time, and if se was't crying she was trying to eat, and arching her back. We chopped it up to colic (which by the way is just a baby crying for longer than 3 hours at a time). Anyways, then she started having blood in her poop, and very stinky green poop aswell. Long story shot she is allergic to milk, eggs and soy. Im no Dr. but if i were you i would cut out my dairy intake and just see what happens, it can take up to 4 weeks for the dairy protein to get out of your system. And its not lactose that babys are allergict to its the milk protien. Just try and see what happens, when i did i made a huge diffrence within a week!!!