I am 17 years old and Thursday of last week I started having abdominal pain on the left and right side right under my ribs. Occasionally I have vomited after I eat. I do not have diarrhea or a fever. No I am not pregnant. I went to the doctor and they said I could be constipated or have the flu however I have been using the restroom regularly and do not feel like I have the flu.

Often medical professionals will go with the simplest solution because that is what it usually is. Did you tell them that you've been regular? Might be a good idea to wait a few days and then go back. So long as they know that you're not faking it.