answers ?!

Princess I
So, I took a pregnancy text when I was 6 days late for my period and it came back negative . So today I'm 8 days late . 
I been feeling really tried, and lazy lately !
What's the best time for me to take another test?  
The dumbest thing I did was had sex with my bf last night . But we always have unprotected sex, and he always pulls out or put on a condom before he about to nut .