okay so a month ago I had sex with my boyfriend, we used a condom and every time we always check if it ripped; and I’m on birth control pills. I was supposed to start my period at the beginning of this month but I was dumb and started my new pack so I think I skipped it. I still haven’t got my period yet, and I heard girls who are pregnant have some kind of implantation bleeding but I haven’t had any of that. Tomorrow I start the placebo pills, should I be worried or am I stressing my self out.