Thanks for query,
I think there is mis understanding about month.your mirena
removed on June 29th.You got your period on 22 of July right?
If you have period on 22 th July & you have started pill on 24 th of July how can you get period now.
Once you are on pill you will get withdrawal bleed only after 4-5 days of stopping pill.
There is also no question of pregnancy