hello i am samantha i have been living with my boyfriend for about 6months and we have been trying for a while and no luck well this month i am late by 3 days and i have never been late before. i always get my period the exact day i should and same time every time. now im 3 days late. i have no added stress or nothing.. i am having lower back pain and always very tired.. but at the same time i have taken 2 clear blue hpt and they say negitive idk what to do is it to early to read positive. i mean my cousin said threw her whole pregnancy with her second she didnt pee positive is thats what happening?.. help please?