How long until protected?

Hi! So, my doctor recently switched me mid pack from sronyx (a combination pill) to the new progestin-only pill “slynd”. (its a new progestin-only pill and the first one that has the same 24 hour window as combination pills, I believe). Does anyone know how long until i’m protected on Slynd? I’ve been on it for about 2 weeks now.

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