Mucus Instead Of Period Could I Be Pregnant. Light Brown Mucus Instead Of Period.?

Could i be pregnant. Light brown mucus instead of period.? - mucus instead of period

I started my birth control two days late this month and had sex, the fourth day of my first week of pills. I want to start my time, but today I only had mild cramping and mucus, blood, brown in color instead of the normal blood. Could I be pregnant or is my period, but dropped because the end of the pills? I always start my period the day I take my 3rd pill inactive in the fourth row of pills, and it would be today.