I agree with schilastica. Please call your OB.
Craving non food items is called pica. You should talk to you ob about it cause it generally means you body needs something you aren't getting. You really do need to tell your ob about it
My craving is tissue , i have to have tissue and water ... this is so weird
Lol I love cornstarch I ate it with all of my pregnancies I crave it so bad I try to limit myself so when I go places I leave it at home but I haven't beeb Able to completely quit yet