only you will know when the time is right...Sex can ceartainly complicate things that much is ceartain...
Try to hold out but if you cant self manipulation is the only way to release sexual frustration...or you can engage in intercourse...which you stated earlier you did not want to do till after the wedding, so in order to fullfill your wishes and your desires....perhaps you need to explore your own body and FIX the issue at hand ( no pun intended).
DR, MO