The pill switch up??

Okay, so I'm on a 28 cycle pill and it has "active" white pills for 3 weeks and then 2 days of placebo pills and then 5 days of pills that have half of the hormones that the white pills do. So today, i was supposed to take the second placebo pill, but I absent mindedly  took the next one (that has half the hormones) instead. Usually I get my period on the second placebo day but I didn't get it today. I just recently because sexually active and stupidly didn't use condoms 4 times in the past week (though he did pull out). I'm kind of freaking out-do you think the fact that I took the wrong pill is the reason I'm late, or do you think I could be pregnant?