Hello, your post is several months old but I came across it while searching for Injectafer threads. Have you had your infusions yet? I'd like to caution you about Injectafer as it is known to cause super low phosphorus. Also, phosphorus needs Vitamin D to be absorbed so if you're low on D, this could be a greater side effect. Iron infusions are game changers, provided it's the right kind. I also have endometriosis, had a hysterectomy in part to correct my anemia (it didn't but that's another thread) and have had probably 20 iron infusions in my life. These last two knocked my phosphorus down and I've been sick for a month.