My granddaughter has been experiencing stomach pain for 3 days" thought she was constipated because she had not had a bowel movement. I gave her a laxative and she went 5 times, but still said she had an ache. She also had a headache and gave her children ibuprofen. She said she was not very hungry for breakfast but she ate anyway. I am concerned it is a more serious matter such as appendicitis. She points to her Lower tummy where it aches. Please advise.