Thursday night i took about 400 mg of advil because i had a really bad headache, then later that night i took excedrin.. which was a bad idea. friday morning i woke up nauseous throwing up, i still feel abdominal pain it is now saturday what can i do?

Did you take these meds with little or no food in your stomach? You apparently developed acute gastritis, inflammation of the stomach lining. Avoid spicy or greasy foods,alcohol&caffeine, coat your stomach lining with antacid like maalox or gelusil 1/2 hour after meals & at bedtime, take pepcid AC according to instructions. You should gradually improve over the next few days.