delayed pms

Clarinda
Ladies out there,
Me and my boyfriend used to have sex when we're together but now we're apart from each other as I went overseas for further studies, my period is expecting to arrive in 2 days but I haven't have any prementual symptoms, I always have it 1 week before my period. Will it be because of hormones changes that we stopped having sex or adapting to new environment here? Would like to seek for advice, thanks!