Hello again, Gennz. Thank you for posting.
You have written us before about pregnancy concerns. It's unlikely you would be pregnant if your period arrived the next day. That's not to say you should have unprotected sex if you wish to avoid pregnancy. But, according to the American Pregnancy Association - the likelihood of getting pregnant right before your period is very low. For women who have a typical cycle of 28 to 30 days or longer and their cycles are regular, it's likely your ovulation occurred between Day 11 and Day 21. The egg is only available 12 to 24 hours for conception.