What Causes Severe Abdominal Pain Along With Sweating And Nausea?

Hi i was at the fair last night, and torwards the end i began to feel a pain in my stomach like i had to use the restroom, but i didnt. But when i did get home I tried to use it but couldnt because the pain was intense while i was in the car. I couldnt stay stoll or anything and i began to sweat alot. But when i got home I experienced vomiting and i still had that pain. I took pepto bismol and i finally got to use the restroom after a few hours. But my stomach was still hurting, it felt as if i still had to use the restroom but nothing happened, but when i did it would only b very little. It kinda looked like i was bleeding but i wasnt sure. It was red alittle. But even the next day my stomach is hurting. I dont know what i can do, its not as interse as it was before, its more bearable but it still bothers me