Hey kid you are only 14 you should not be worrying about your weight. you have a lot of hormones running through your body at that age, and can cause you to retain water, or loose it. I would not even worry about using a whey product because more than likely you are getting bigger just by being in the gym. Testosterone at that age is going crazy in the body and one could start getting bigger just by looking at weights! lol
I see that you are a wrestler. If you weigh 127, wouldn't you want to wrestle at 125? I know that it is off season, but to get up to 135-140 with decent muscle would be hard to do and cut down to 130-135 during season would throw away all your gains. I would stick to lifting hard and eating healthy. I was a small 160 pounder my junior year of high school because I cut from 180, but my senior year I was a huge 160 pounder because when the off season rolled around I just ate properly, trained, and worked hard.
This is just my .02 cents. you can take it or leave it