I would try gripe water... It sounds more like gas than constipation to me. If she was constipated, her BMs should have been hard, not soft. Also, since you are nursing her, she should be able to go 3-5 days without a BM before she's considered 'constipated. My DD was very regular when she was very young, and once she turned around the same age as your DD her BM 'schedule' changed, and she started having very irregular BMs. After a while they got regular again. The things that usually trigger gas pains in my DD are excess milk (more than usual amount) broccoli, asparagus, really spicy food, stuff like that. You might also try an abdominal massage. After a nice, warm bath, lay her on top of her diaper, use a little lotion, and stroke hand-over-hand from her belly button down for a little while. Then, using the heel of your hand, (starting from her right side and working to her left) rub small clockwise circles in the area under her belly button. You could also do the 'I Love You' stroke; trace the shape of an 'I' on her right side, 'L' in the center, and 'U' on her left. I usually end with the hand-over-hand thing. This usually calms my DD right down when she's having gas issues, or gets things moving when she's constipated. Use the same amount of pressure on her as would be comfortable on your eye, so you don't rub too hard. Good luck! :)