Hello,
Thanks for your query at DoctorSpring.com.
I gather that you wish to switch pills, change from one brand to another.
Here is how to go about it.
Finish the current pill pack.
Wait for your period ( a withdrawal bleed ) after the pill pack is over.
Start the new type of pill from day 2 of your period, and continue taking it routinely.
Hope that is clear enough.
let me know if you wish for further clarifications.
Good day!