Hi! Based on your timeline, yes, there's a possibility you could be pregnant, especially if that week of active sex around Feb 25 fell during your fertile window (usually around ovulation, which is typically 12-16 days after your period starts). The best way to know for sure is to take a pregnancy test now, or better yet, see your doctor para ma-confirm properly and ma-guide ka ng maayos. Marami sa amin na nangyari rin 'to, so don't worry, just get checked ASAP para sure na, and they can give you proper advice from there. Keep us posted if gusto mo!