I am 14 and have a lot of?

I am a 14 year old girl and I just had a dramatic weight loss and have a lot of stretch marks on my arms thighs stomach legs and on my hips. What can I do to get rid of them? I tried palmers coco er cream and it only makes my skin soft but dosent atleast make the marks less visible. So are there any creams out there that can help me get rid or reduce the stretch marks.