Does Laxative Show Up In A Blood Test Report?

On weekdays, I skip breakfast, take 2 tablespoons of milk of magnesia, and sometimes 1 caffeine pill. For lunch, I have propel zero calorie vitamin water and 3 ounces of grapes which is 50 calories. When I get home, I take 2 more tablespoons of milk of magnesia, and then binge on junk food. I then sleep becuase I normally feel nauseous. I wake up have a little bit less for dinner than everyone else and sometimes normal. I try not to eat a snack. Before bed, I take 2 tablespoons of mineral oil and sometimes do my exercises which are crunches. I do between 100 and 150 at a time but different kinds of crunches. On weekends, I continue the laxative use but eat a lot of food. I am 105 or 106 at my highest and can get down to 102-103. I am 17 years old and am 5 8 . My doctor told me not to go below 110. However, he does not think I have a problem because I weighed 112 at last appointment in september but I gained on purpose before appointment. This friday I have a blood test and I am worried my laxative use will show up. This has been going on for a month and a half now. Will my blood tests show my lax use and not eating enough?