<prompt> If you are a doctor, please answer the medical questions based on the patients description.hai , iam 26 yr old. my last menstrual period was on sep 14th and my avg menstrual period is 37 days..i wil always get correct 1 week delay ,so my expecting day of menstruation is oct 21st. i used to have premestruation pains like tender brest 1 week before period but now am not having any symptoms , so i tested home pregnancy kit on oct 21st but it shows negative..could i be pregnant ? if not why am not having pre menstrual pains?please help me in figuring out.  <response>: HI, I understand your concern. 21st October, the expected day of period was earlier to test by urine pregnancy test. Please repeat test now after minimum 8 days delay in periods. It may turn ve to confirm pregnancy. In case its -ve, the delay is likely due to hormonal imbalance. Which is to be investigated by hormonal assay, USG abdomen treated according to cause. Consult a gynecologist please. Thanks. 