Im 14. Yesterday i had really bad heartburn. Today ive had a terrible stomach ache, horrible diahrea, and some weird things "coming out". What i mean by that is that when i go to the bathroom weird things are happening. Ive been trying to eat healthy for a couple days, i just got back from a 9 day trip to japan and ate all the cultural meals, and for lunch today i had a simple ceasar salad. About 5 minutes ago i went to the bathroom - green lettuce came out. Whats wrong? What should i do?