I started the birth control (combined) pill on March 3rd (first day of my period). I had sex on the 11th (we used condom and he pulled out/ and i was on BC for over 7 days). On the 18th, my boyfriend fingered me, he always fingered me, but afterwards when i wiped, there was light pink blood and it was only when i wiped that night and like barely the next morning. IS IT IMPLANTATION? it would’ve been 12 days before my estimated period but because i’m on the pill (placebo week)