Thanks for the links. I just have to read them now.
It turns out the injectable my MW carries contains aluminum. I do want to have something on hand and I found a local compounding pharmacy that carries an oral dose that is a plant based K1 in olive oil. I am fairly certain I will go with that.
We'll probably do the "wait and see how birth goes" thing. I've got alfalfa to take...I should start that now. I'm feel like I'd go with injection from what I remember reading about digestive issues.