What should I do for my 4 week old daughter who is fussy with tummy problems and isnt pooping normal?

How are the poops not normal? Just because she only went twice? How's the consistency? If she is pooping twice a day and it is normal consistency, then then she is not constipated. If it is harder than usual, try suppositories. They work very soon after inserting. You are not giving her more cereal than normal or thickening it more now are you? If so, I would go back to the way it was before the problem started. Also, to get the fussiness to pipe down, try a heating pad. Be VERY careful, some get too warm. Put under blanket she lays on and layer them before lying her down. Do this when she is awake so you can place her on her tummy. This should soothe the upset tummy. When she is sleeping, lie her on her left side. Because of the direction of the colon in the human body, gravity works with this position to help pass anything that is in there. Good luck!