My period is almost 2 weeks late... 2 tests both negative... having heart burn, lower back pain, and fatigue.. could i still be pregnant?

? pregnant: Yes - However - if you are regular - this is concerning - if you are having irregular periods - less concerning - I would ask your doctor for a serum HCG test - while the urine tests are good (try doing a first urine of the day test one more time) a serum HCG is very accurate. (all this is assuming you are not on birth control and your partner has NOT had a vasectomy)