When will I get my period on the pill?

So I started my pill mid cycle (doctor said it was okay) so I lengthened my cycle. I am on my second placebo pill and have had a little spotting but not a full blown period. I did have sex this month (leaflet says I am protected after 7 days, had sex after 10 and also used a condom) but yeah I'm on day two placebo and no period! When will it show?