i am 8 days late and my periods have always been on time for the last 6 years. i feel nauseated, tired, sore nipples , heart burns, and the missed period is having me worried. i have taken 4 urine test and all of them ave come back negative. what are the chances that i am pregnant and when can i see positive results on a home test? this anxiousness is really getting to me....:( yours Nana