What Causes Stomach Cramps,pale Stool And Vomiting In Children?

My 4 yr old was complaining of a stomach ache one month ago today. For a week she had pale, yellow poop / diarrhea. She then woke up and vomited, so I took her to a dr. and she said it was a virus. Well, she didn t throw up anymore but continued with stomach cramps and pale poop a couple more weeks so I took her to pediatrician. She said sensitive stomach and bring back if starts vomiting or things get worse. A few days later she was throwing up all night into early morning. I took her back to pediatrician and she said probably another virus and to just watch her. Now 5 days have gone by, still complains of stomach hurting, pale poop, doesn t eat very much but I m pushing fluids. One month to the day of first onset. I m praying this gets better soon. Should I be more concerned than what pediatrician is saying. No fever... ever... this whole time.