So for the past few weeks I have had the urge to chew on sponges.. I was in the bath and had just bought a new bath sponge and decided to give in to the urge and now it's all I think about almost all day. I don't want to swallow the sponge just chew on it, whenever I'm in the bathroom or even just washing up its all I can think of and it makes me feel anxious when I try and stop myself. When I ask my husband or family for advice they all just think I'm weird, I'v had a look on some forums and other people have put it down to low iron levels which I know I currently have since being pregnant. My question to anyone who knows about these things or anyone who has done the same is does it go away after giving birth and would/did it go away when taking iron supplements?