The day before your period is a fertile/ ovulation day so it is possible that you are pregnant.

im in the same boat. but when i went to amazingpregnancy.com i put in when i had sex(concieved) and i had sex a day before my period which i didnt know it was coming on so fast, but it says now that im 3 or 4 wks and 7 days pregnant. i did it on the 19 of may and today is the 26..how is that possible..i know you can get pregnant while on your period and so far im havng symptoms.

In a "normal" cycle, you should ovulate at around day 14, the middle of the cycle. It is unlikely you will ovulate the day before your period, but it is not impossible. It is even possible to get pregnant on your period, although is somewhat unlikely.

Another thing: sperm can live in a woman's body for up to five days. This can be a significant window.

Go buy a pregnancy test, read the directions and take it when the test says it's most accurate after your missed period (otherwise, you will be more likely to get a false-negative). Next time, if you don't want to get pregnant, use protection.

Well, I was supposed to start my period on the 24th. I had sex unprotected 4 times before it, trying to get pregnant. May 10th we did. May 16th. May 23rd, and may 25th. One day before and after I was supposed to start my period. I am now pregnant. It may have been from the other two times though. But I am pregnant, so maybe the day before you could be?

Well I had my last period April 2o i had sex protected the day before before my period. i took a test in 4 days and its positive.but i never got a May period why didnt i get a may period? After sex i felt funny then 4 days i got a positive test!?