No period three days late as of 8/4/14 major lower back pain very sleepy too . help ?

Pregnancy test...: Are you sexually active? If so, you should take a pregnancy test to see if you are pregnant. Either way, if you are having significant pain you should also be seen by your physician for an evaluation.

Get a pregnancy test: These can all be signs of early pregnancy. Most drug store pregnancy tests are just as accurate as tests done in a doctor's office. Take the test using your first morning's urine when it is the most concentrated. If it is negative, see a doctor for a more thorough exam.

Pregnant?: If you are not using reliable birth control, and are sexually active, this could be a sign of early pregnancy. You could do a home pregnancy test or wait for a few days to see if your period comes late. In the mean time, try sleeping extra and taking a warm bath for your low back. If symptoms continue, you may need to be evaluated by your doctor.