I went in for a routine std test three weeks ago and chlymadia was found rectally, but not in my urine or blood test. I had no symptoms and was prescribed the standard arithromycin antibiotic. I week went by and I noticed that there was a discomfort around my right testicle that feels like an annoying slight numb feeling. No pain or any discharge. I went to my doctor and he prescribed 1 dosage of z pack. Is it normal that a symptom can occur after I taking the antibiotic? My doctor said he was convicted confused why the health clinic gave me arithromycin to cure chlymadia, but isn't z pack the same thing? Also, since I tested for Clymadia rectally, is it weird that I am feeling symptoms in my testicle?