Could My Habit Of Eating Slate Pencils, Low Blood Count, And Recent Weight Loss Be Causing The Sharp Right Abdominal Pain I M Now Experiencing?

Hello i am 21 yr old female i have a habit of eating slate pencil (chalk) since almost 4yrs now. I have low blood count since from 5 years. And recently due to some stress my weight has reduced to 2kgs making more underweight that s 40kgs .i have been eating slate pencil again since from one month and i have sharp pain in my right abdomen time to time before i never had this problem i cant understand why it is happening..