Hi, I am a 41 yr old female with a history of bowel obstructions and a current diagnosis of Lupus. Yesterday, very suddenly, I experienced the most intense abdominal pain of my entire life. It was actually so bad, I passed out from the pain. I spent the next 4 hours bleeding rectally (no stool, just lots of blood and mucus). So far today I have had occasional cramps, but no more bleeding, but I did develop a low grade fever today of 100.0 and I have noticed that my left side of my abdomen is extremely painful when I press on it. Does this sound serious or since the bleeding has now stopped, is it okay to just wait and see? Thank you very much for taking the time to read this.