I'm 6 days late and there is no sign of my period coming (sore breasts are always my indicator) all the pregnancy tests are negative. any opinions?

Hormonal imbalance: You may wish to redo the pregnancy test in 4-5 days to make sure. Use first morning urine. Menstrual irregularities are not uncommon and anovulatory cycle is a common cause. If you miss more than two periods it would be time to see your doctor. Consult this site for more information on this topic. http://www.nichd.nih.gov/health/topics/menstruation/conditioninfo/Pages/causes.aspx

Watch and wait: if it hasn't come in 1 week repeat the test. If still negative see a doctor

Late period: Reasons for missed/late periods: low body weight, obesity, marked weight ^ or v, over-exercise, endurance athletics, breast-feeding, ^ stress, illness, eating disorders (bulimia or anorexia), anovulatory cycle (no egg released), travel, hormone irregularities, drug use, meds (i.e., birth control) or medical problems (i.e. PCOS). #1 reason is pregnancy.