Maybe you are not pregnant! If you late for your period, i suggest taking another etst in a few days, if still negative then go and see your doctor.
A negative test means you are not pregnant or that you tested too early or that the test is faulty. If further tests show negative then I would take this to mean that you are not pregnant.
Sorry just saw your other post furthur down the page. I would say if you are that late and your tests are coming up negative it's time to call the MD. Most people should be showing up positive by now but there are some people who just don't get positive urine pregnancy tests. So call your MD and they will probably want to see you.
Have you missed your period yet? If so by how many days? If you missed your period I would take another one in like 2-3 days. If it's been more than a week than I would call your MD and see if he can order some bloodwork for you. If you have not missed your period you just may be testing too soon and should probably wait until you miss your period. Don't know much about your situation so I am not of much help. Sorry.