Placebo pills SOS

Hey. I started a new birth control Dec 9. Haven’t had any symptoms of switching until this week. Dr told me to use extra protection for a week or 2 after to get adjusted and make sure I’m protected. I skipped my first period week bc I didn’t wanna deal w that because of New Years plans. Now I’m confused bc of my symptoms and wanna take those pills to double check. I have taken two of my new pack.

Can I go back and take my

Placebo pills now? Or is it too late?