<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been feeling very down and sad after giving birth to my baby. Its been a few weeks now and I just cant seem to shake it off.  <response>: Im sorry to hear that. Based on the symptoms youve described, I would recommend a depression screen to see if you have postpartum depression. Additionally, we may need to do a pelvis exam and a urinalysis to make sure your physical health is in good shape. Its also important to examine your breast for any lactation problems. Mental health counseling can also help you cope with the emotional challenges of postpartum depression. Furthermore, it would be best to conduct an ultrasonography to check on your physical health, and a chlamydia test to rule out the possibility of a sexually transmitted disease. 