hi, i was just prescribed primolutnor in order to push off my period, bc im going on vacation in a few weeks with my husband and was due to get it then. the dr told me to take it on the 18th day of my cycle, which is tmrw, until after i come back from the vacation - which is still in a few weeks. is primolutnor enough to push my period off until mid august? (my last period was june 28th). also, im breastfeeding - my baby is 9 months old and she is still only breastfeeding - is it safe, and will the primolutnor have an effect on my milk? thank you.