As per my view about your query about bleeding.
On last day of periods there was not needed to take anything. Because of its safe day.
Although you had taken ipill
and it cause such difference in hormonal balance
, thus you got bleeding
on 7th day. Now you have to wait and watch.
No one can say exact effect of the ipill, becasue its every time different and it depend on every one's hormonal structure.
So be relax, wait and watch and do not do anything if it is not hurting you.
But taking ipill often n often is not good for health. Its good to use condom.