How likely is it to miss two periods and have two urine pregnancy tests come back negative?
If you just started taking birth control or are switching, that is probably the reason why. Birth control does some funky things to your period when you first start taking it. There are several things that can contribute to a negative pregnancy test even if you are pregnant. Some medications can give you a false negative, the timing of the test can affect the results. If you did not follow directions properly; if you let the test sit for too long the results may read negative after a while. It is important to read the results within the amount of time given on the instructions of that particular pregnancy test you bought. If you did not perform the test properly (example: you drank a lot of fluids before taking the test, which can dilute your urine).
