I wouldn't. traditionally the wedding band is worn first, and then the second band is given on an anniversary or special occasion. In the states its called an anniversary band, but in England we called it an eternity ring.
I would be asking the same question if I were you hehe :) But..... if it were me, even though I would be SO tempted, I would wait until after the wedding to wear your bands together. I think it will be even more special to have the experience of wearing the bands after the wedding.
i have 2 bands too and FH has hidden them from me because i kept wearing them. i wanted to wear just one but he really wanted me to wait. i've heard its bad luck to wear your wedding band before your big day, but i didn't really care about stuff like that.
@SAPPHIRE WE HAD IT MADE WITH TWO BANDS