I'm , age 21, I had two days ago sweet and then pepsi without having anything from pm (at 5pm only I felt hungry) but then I developed a pain in my back, then in my chest and then the pain became unbearable. I thought it was due to gas formation but two days have already gone but after taking medicine like famocid and digiene (for gas problems) I still develop the pain in my back and now in my throat. After I drink water one or two timesi get hiccups and maybe one time I fart. Then after 10 minutes the pain again slowly develops. What should I do? please help me. My exams are near.