There’s no way to predict/control bleeding at any time on the pill, even if you’ve been on the pill for years. Irregular bleeding is a possible side effect of the pill, again even if you’ve been on it for years, but it is more common when you’re new to the pill as you’re adjusting to it. You may start bleeding at any time while on the break week, including day 5/6/7. You also may not bleed at all.
Btw the pill does not give you regular natural periods, it stops natural periods entirely. Any bleeding you experience on the pill is not a real natural period, it’s just a side effect of the pill. If it’s on the break week it’s called withdrawal bleeding, due to the lack of hormones on the break week. If it’s while taking active pills it’s called breakthrough bleeding.