I had sex aday before my supposed period it was unprotected and it was the first time in a very long time. when will i get my period?

No change in period: Having intercourse a day or so prior to your expected period should not change the timing of your period. If you have already ovulated this month, this time of intercourse should not make you pregnant. But if your period is late, it's always a good idea to do a pregnancy test.

Soon: if your cycle have been regular, just wait for the next to begin. If you miss a cycle, get checked for pregnancy. This is a good time to think about birth control.

On time: Sex the day before your period is due should not delay your period.