For the last 2 weeks, I have been having loose stools with traces of blood, without abdominal pain, fever or other symptoms. I sometimes have a cramp, which is relieved when I have a bowel movement. Is this alarming?

Hello, the presence of blood in the stool is a serious matter and should be addressed by a medical professional as soon as possible. It is possible that your symptoms are related to the antibiotics you took 3 weeks ago. I strongly advise that you make an appointment with a doctor this week.