Major stretchmarks, 14?

Alrite im 14 years old, and for a couple years now i have had stretchmarks all over my body.(upper arms, , knees, thighs, back, but hips) i was never overweight, or changed my weight dramitically.. i think its because i grew too quickly.. i recently have started to put on Cocoa er Formula with Vitamin E Skin Therapy Oil.. And i put on Palmers Cocoa er Lotion. I know i will not completely be able to hide stretch marks, but i want them to be less noticible at least. The actual scars are light, and my skin is not too dark, but pretty tan. Is it too late for them to become less noticeable? If not, could you also give me some more advice on what other techniques could help the process quicker? Considering i am going to go to high school pretty soon, i want to at least be able to wear a half sleeved shirt without pulling it down all the time.. thank you!