Period related - sorry!

Hi ladies, Just after some advice really - this isn’t toddler related! I’ve been off the contraceptive pill now for 3 months as we’re planning on having baby no2 but we’ve been using protection until we are fully ready. My periods have always been quite regular, I’m 3 days late now. I’ve taken a pregnancy test and it’s negative. We’re going away next week and planned somewhere with a spa (as I thought I would have finished my period by then!) So what do I do? Is there a pill I can take to prevent my period altogether or just risk it in case it’s a missed period? Thank you!! Xx