Please help 😩

I’m 6 days late but getting negative tests. Unprotected sex on August 13th. That night I had very very faint spotting (like 1 spot) then the next morning one spot very faint (ovulation bleeding? Idk never had that before) My cycle is normally regular so I’m wondering what’s going on with me. Anyone experience something similar or be pregnant even with taking several tests after AF was due.