Pill pregnancy?

So I'm paranoid as hell, being I've never taken the mini pill until recently. I just started my second pack, and supposedly you're supposed to get your period on the blue pill days. I didn't. There was some spotting and that's it, so we did the deed, several times, no protection. (That's what birth control is for right?)

So what are the odds that I'm an idiot and should have used a back up form on the blue days? I haven't missed any days, and always taken the pill by 10 am.

I'm taking Orsythia if that helps any.