Melissa, if your period is late and you don't normally get sick from your period, it's a good posibility that you are pregnant. Some women are just more fertile than others and get pregnant even while taking the pill regularily. All I did was try once after getting off the pill and got pregnant.
About the pregnancy tests. Some women don't have enough of the hormone "hcg" in the body to tell the home pg test that they are pg. Mine were always low, and didn't show up until I was at least one wk late on my period. Sometimes even later than that. It could mean that the pg is very early on, or that it might be an unhealthy one . When the hcg count is high, it makes the body more nauseous, and means most likely that it's a healthy one. With my 3 mc's, I had low hcg levels that didnt' show up right away. So, take a test every few days if I were u. It'll show up sooner or later. Good luck
hope all goes well for you.
Beth edd 12-25-03