Okay so i take the birth control loestrgin 24 fe. i've been on the pill for about 5 months now and i've always had regular periods. well this month i missed two birth control pills and never took the two i missed. i immediatly had a cycle that last 5 days. now it's a week later for my last cycle and i think i'm having another one. todays the first day and it's dark brown and it's not heavy at all just more like spotting...should i be concerned??