If I haven't gotten my period but been bleeding or spotting does that mean I'm pregnant?

Check a preg test. A home pregnancy test would be the best way to find out. Why stress about it? Head to the dollar store and pick a home test.
Irregular bleeding. Vaginal spotting is abnormal. If sexually active, a reliable pregnancy test should be done since ectopic pregnancy often presents in this way. Ectopic or tubal pregnancy is a serious and life threatening condition. Early diagnosis can be life saving. See your doctor.