Girls, please share your experience eating clay/earth during pregnancy…

Girls, please share your experience eating clay/earth during pregnancy. I constantly eat natural clay and flour, I can't help it, I really like this taste and smell. I eat only a little bit, literally 10-15g per day, but I worry that it might be dangerous. (I only eat food-grade flour and food-grade clay, I don't pick them up from the streets ?)