Stomach Pain, Nausea. Recommendations?

Hi, I have been having really sharp stomach pains since Friday, but today from 930pm to 11 they were the worse. I could barely move and if i did the pains would get worse and I felt nauseous. I ended up going to the restroom about 3 times and even got some sharp shooting pains in by buttox and under the left side of my rib cage. I am 20 years old and tend to get these kind of sharp abdominal pains, but not as bad as today. Today I was in tears and the pain is in my lower abdominal section but above my private. Can I get any recommendations if to go to the emergency room? Right now it is not bothering me as much, but my stomach still feels very sensitive and twisted. I am also not supposed to start my period until the 1st of the month, so I def. know it's not cramps. Please help.