Hi I Want To Know Whether It Is Safe To

hi i want to know whether it is safe to take primolut as i want to delay my period due to my religious trip in few days.My gynae prescribed primolut but i am in doubt as i had unprotected sex with my hubby few weeks back till last night and i really want to get pregnant although i dont know how to check for pregnancy as i had a miscarriage last month and till now i dont get my first period.