Falmina 28 tablet.

Ok I may be over reacting but I just need a few questions answered. I switched birth control methods about 3 months back from Depo injection to falmina pill. And my period came on the Friday of my reminder week of my first pack. Then it came on the Monday of my reminder week of my second pack. Now my period hasn't come on my third pack reminder week. It's only Tuesday of it, but I just don't know what to expect. My other half and I had unprotected sex (I'm allergic to most of the condoms sold in stores so we dont use them) during the first week of this pack. And i had some spotting that weekend for two days. Should I be worried about pregnancy or just give it a few more days. I'm not running right out to buy a pregnancy test if I shouldn't be worried, but I was told my period should be normal after the first couple months, so I don't know what to expect.