Hi, I have experienced over the last two days after two main, (largish), meals severe abdominal pain and stomach cramping, as well as achy back, and nausea but without vomit, and hot sweats, soon if not immediately after eating / finishing my food. Why might this be? in the days before yesterday i didnt eat very much due to being very busy, but usually eat regularly and healthily and am in good shape and regularly exercise (20 years old female). Do i need to visit a doctor?