Im 16, 5 9 , 130lbs, and im interested in a 10 day water fast. I have smoked weed for the last 3 months and Id like to clean out my lungs as much as possible, and I feel as though a ten day fast would be sufficient for me because I have such little stored fat on me, so it seems like my body would try to rid itself of toxins pretty early into the fast. Any suggestions ?