On birth control not getting my period

I spotted a few days before the placebo pills and I’m still very very lightly spotting off and on. It’s so light I wouldn’t notice if I wasn’t “inspecting” looking for blood. I don’t think im pregnant because it’s the combination pills and I took it at the same time everyday. My doctor told me to use condoms for 7 days and I didn’t even have sex for the first 7 days.

Idk what to think? It has placebo pills so I’m supposed to be having a period.