If you normally have regular periods and they are now late then that is not normal, but there could be a few differnt contributing factors. Such as the fact you are probably now worrying that you are pregnant so that will most likely delay your period even more. If your pregnancy test came back negative twice, chances are you are not pregnant, if you are still worried, go see your doctor for confirmation, in the meantime while you are not protected by the pill, use some kind of other protection such as condoms until you know you are covered again.
Take care, be safe.......
.::suzy::.