So this explains why I can barely get out of bed!! My iron is dangerously low!! My levels are at 6.5 right now. If anyone is feeling extremely tired, craving crushed ice, and in general very very lethargic, demand to get your iron tested!  I started a liquid supplement (which tastes like chewing on a rusty nail) and I'm praying my levels go up in a few weeks and I start to feel better!!