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 requires prompt medical attention. It is possible that your symptoms are related to the antibiotics you took 3 weeks ago. I recommend that you see a doctor quickly, this week.