birth control?

So I started my birth control on April 25 since then ofc I've been having unprotected sex but he never cums in me (we also rely on the pull out method and always goes well) my period was supposed to arrive 6 days ago and it hasn't.. it's been almost a month with my birth control (Deopshot), should I be worried of Precum or is this just a side affect of the birth control?