Hi. Your description of the timing, character and nature of pain would have helped me to give a better idea. From the history you have provided, I can think of spasmodic pains in abdomen severe enough to make her cry. Vomiting can be a a reaction of the body to pain or can be due to some obstruction. There is history of fever too. This indicate an infection like of the gall bladder or appendix as most probable cause. I Would suggest you to consult a Gastro/ Surgeon. Get the clinical examination done and go for a urgent Ultrasonography / Ct scan of the abdomen. A proper diagnosis always leads to the proper treatment.