This is my 3rd baby n with the 1st n this one I was on my period. N sure enough I got pregnant. So yes its possible.
If by Jag you mean your period. It's not likely that you would become pregnant during your period. During the bleeding portion of your menstrual cycle your uterus is shedding it's lining. Therefore, even if an egg WERE to be released (tho this typically occurs approximately halfway through your cycle) and fertilized, there would be nothing for it to implant to in the uterus.
That said, ANYTIME you have intercourse you run the risk of pregnancy, regardless of when in your cycle you do so. Everyone once in awhile a woman can have a screwy cycle where she ovulates early or late.