First and foremost... I am THRILLED to have my vaccine. I support it 100%.
But I came across this article from Huff Post and I was like... whoa. This might be happening to me.
Turns out the vaccine, my effect your menstrual period. For some it gets heavier, and for others, it stops.
It's not permanent... but it is enough to notice.
Here is the article. And if you are so inclined, you can help with a research study too.