At 6 weeks I started birth control. My period ended up coming a week before supposed to according to pills.so I started new pack a week early and got on track with pills. I thought I was back to normal but this month I had some spotting light bleeding 2 weeks into pills and now been taking the ones for period week for 3 days and still no period. We use both condoms and birth control so don't see how I would be pregnant. I had cramping the first day of my period pills and some on third. So I've been expecting my period but hasn't showed yet. Also my baby is formula fed. How long should it take to get back to normal?