<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing bleeding in between my periods, and Im not sure whats causing it.  <response>: Based on your symptoms, we will need to conduct several medical tests to identify the cause. We will begin with a complete blood count, a standard pregnancy test, a urinalysis, and an examination of your pelvis and breast. Additionally, we will need to conduct an ultrasonography to look for any abnormalities in the reproductive organs. 