I'm a 19 year old female I do have ibs I was diagnosed when I was a little kid and I don't have a fever, it happened tonight has not happened before, I felt like I was going to have a bowel movement I tried pushing nothing would come out except a lot of gas then I all the sudden started having a severe sharp pain in my left side near my hip after about ten minutes it stopped and now it hurts in the same place when I move, I felt nauseated when it first happened then the nausea quickly went away. I don't know if this helps the last to days I had diarriah I thought and when I was in the shower some nasty brown mucus like stuff leaked out. Any help of what this is would be appreciated.