I accidentally consume 2000 mg of ibuprofen and advil at once. i am 16, weighs 111.8 pounds and i'm 5'5. what will happen to me?

That is above the maximum one-time dose but lower than the maximum day dose. Best not to take any more for a couple of days. The biggest effect is on the stomach and intestines. They can get irritated or have bleeding. Watch for signs of that and use TUMS and over the counter Pepcid for the next couple of days. If you get any stomach or intestine symptoms, see a doctor. Discuss all with parents.