[Zvon]

Using progesterone cream isn't known for causing an increase in prolactin. I haven't come across women reporting that, so it doesn't seem likely. It doesn't cause a drop in thyroid hormones either.

Because you have an increase in prolactin and a drop in thyroid hormones, it does suggest that there's some interplay between these two which has resulted in both happening at the same time.

Thank you so much for your insight and this information! I was SURE I did something wrong, I had some sort of regrets. Okay, calming down, it's the thyroid - it needs help. Okay. I'm starting - finally - the exciting journey of studying the hormones. Yupee. I really have to find the reason for this. But as my luteal phase is coming, I'm gonna continue the progesterone cream treatment - it really helped me and I didn't want to discontinue this.