Progesterone and ttc help

Theresa • Mommy of 3, two heavenly babies and pregnant with our ❤️💛💚💙💜

So Dr gave me progesterone capsules 200 via orally once a day. I started taking them last night. I'm 5dpo today. I feel like if I'm not pregnant this could mess my cycle up. Like if no bfp I stop and from what I'm reading it can take up to two weeks to get my period.

Has anyone has experiences they cN share with me. Please. I'm not sure I'm doing the right thing by taking them.

Im 39. Ttc our 4th. Had two back to back early miscarriages. Just background info for you