Confused

Okay ummm first time posting.. but last month 3.8.18 my AF came a day early i have a regular cycle 28 days for 5 days my opk said i was at peak from 3 days Thrusday-Saturday which i think my 3rd day “Saturday “ was at its highest. I BD like late night early morning Friday/Saturday A.M. my period is due Today 4.05.18 I’m one day late now but idk apart of me think i may be prego but the next part don’t think so i took a test at 10 Dpo & the day my period was due but it’s still Negative i just don’t know i need Advice 😩😔