Hi, I have recently had a fever, lower abdominal pain, aches, nausea and was treated with antibiotics. It appeared to help for a bit. Had my menstral cycle two weeks ago, now its back with dark brown blood. I have had an ultrasound, ct scan and waiting for colonoscopy. I have abdominal pain all over and a fever of 38.4 presently with aches. This is preventing me from keeping my very active lifestyle. Should I visit the ER today or wait to see what the colonoscopy shows in when I have it in four day?