Yeah I was surprised when she mentioned evening primrose as well, but I'm at my tits' end so I figured I should at least look into it. I did find a paper on PubMed indicating that evening primrose and Vitamin E as combination or standalone therapy could help with cyclical breast pain so plausibly it could be helpful. However that seems to be contradicted by the review article you shared.
I started at 100mg progesterone and that wasn't enough. Tried 200mg for a while and that helped to some degree with the brain fog and night sweats but I was still having long periods of sleeplessness at night. So on her recommendation I went up to 300mg. She said I could technically take up to 400mg but 300 seems to be the sweet spot for symptom relief. But I do think the nipple pain coincides with the increased progesterone.
Thank you as always for such a detailed and well thought out reply! If I figure out a solution for this I'll be sure to share it with you. We deserve better in life than perpetually sore nips!