could i still be pregnant?

i know this probably sounds silly so bear with me... i’ve been on the pill for almost 3 years and i take it at pretty much the same time every night (give or take an hour). my bf and i don’t use condoms and i recently let him cum in me for the first time.... i got my withdrawal bleed normally on the placebo week, but is it possible to still be pregnant? i’m having some symptoms and kinda freaking out! any help is much appreciated