The hcg levels vary in women for different reasons. In some cases they are low and eventually increase. Sometimes in early pregnancy the numbers are low enough that a hpt cannot detect this hormone to give you a positive result. It doesn't always mean that you are carring to eventually miscarry. Doctors order a series of blood work to determine hcg levels and progesterone levels(this one carries the baby to full term) to see one if there is a pregnancy and two to see if the pregancy can be carried along. There are so many scientific reasons why. Your best bet is to see a healthcare professional. Good luck

Lisa-didn;t you post in another one that you got your period? If yes and your tests keep coming out neg then you're not pregnant right now.