Pregnant on Your last 3 days of period? INFO NEEDED

Can you get pregnant on your period? So it been all week but have had sex everyday do to it helps so much with cramps.. Well the last two days and today we have pretty much been like ok no need to pull out ... I have been off my period for two days and has been unprotected my fiancé would love a baby now and of course I want to fit into a wedding dress .... Can you get prego that way?