first you should stop lying . 19 yo 5 foot 8 and 102 lbs . 120 lbs would be deathly skinny for someon 5 foot 8. If your telling the truth about your age and weight now. A low dose cycle of dbol (20 mgs a day) would be great along with a high calorie high carb and high protein diet. Its a cheap steroid . the sides are not that bad at a low dose . And the increase in water weight is not bad for someone naturally thin.