I am having weird cravings at 31 weeks and 4 days pregnant?

For the past few weeks i've been craving soap, I am being serious every day when i have a shower i have to lick or get a flannel and chew the soap. On Monday i found out i was severly anaemic, I've heard that it's a lack of something if you crave non-edible items. So could this be because I am lacking In Iron. Has anybody else experienced weird cravings like this.