I’m so disappointed !!

I’m 21 weeks pregnant and this is my fourth pregnancy and first set of twins. All my pregnancy I’ve craved and also ate tissue🥺 Over the past couple of weeks I’ve developed this horrible habit once again. I am not proud of it and I feel like I’ve failed as a mother once again. Sometime I eat it unaware that I’m really eating tissue 😭and on top of that baby b already has a complication. Please pray I get rid of this nasty habit!! Also my iron was low so I take iron pills. Why I’m craving it? I have no idea. Please pray for me