At My Local Bootcamp Class This Evening, The First Excercise

At my local bootcamp class this evening, the first excercise I went to do when I bent down I felt a severe pain on my left side, more to the front than the side, it felt like something popped. I kept goin with great difficulty as I thought it was because I ate dinner and the pain would pass but it didn't. I am now in bed in pain, when I move or cough or press on it I am in agony.