You missed your periods by one day and you are having lower back pain that you usually have before periods you did pregnancy test today it was negative can you still be pregnant?

Yes, you can still be pregnant. Did you take the test in the morning, when hcg levels (found in pregnancy urine) are most detective. Also, some people get several neg.s before a positive. But you might not be as well. Alot of people, even if you are always on time with your period, will once in a blue moon have a late period. Lower back pain... could be anything. sign of preg. or sign of period. Wait a few more days.