Oh, and I forgot to mention that this is what I use during that time of the month, and it works well for me. Two sprays of Instant Female Magic is the sweet spot for me. Three sprays is just one spray too much. Jasmin has a link to an article somewhere, I think it actually may be on the product page in the store for this item, which describes how a medical group has been testing Androstadienone as a PMS treatment. I’ll post it if I can find it.
And definitely send her a copy of this article that I posted yesterday. At the very least, it will make her smile. And you know what they say, “Laughter is the best medicine.” 
https://pheromonetalk.com/t/a-little-humor-for-the-girls-this-morning/2601