Maybe you should go see OBYGN doctor
you are luck get pregnat
I wouldn't say you're pregnant just yet, continue taking your pills and if you miss your next period take another test and if it's still negative I'd ask the doctor about it. There's more than one reason for a missed period, it's not always due to pregnancy.
there isn't enough info here to give a definitive answer. when did you have sex last? Is it possible you lapsed on timing by a few hours and had sex that same day? how long have you been taking the pills? when were you due for AF and when did you take your test?
you could be the one in the million to get preggo on BCP and never miss it. Chances are that i could imagine would be hormones. Depending what brand you're on can greatly effect your AFs.