Bleeding 5 weeks post partum

I’m 5 weeks + 6 days postpartum and my lochia stopped about 2 weeks ago but 2 days ago I started bleeding red again and I’m still bleeding now, is this lochia starting again or could this be my first period? I have no signs of infection no fever it doesn’t smell bad etc. Also I started birth control when baby was a week old and I’m only breast feeding her