What is the best way to get rid of stretch marks on thighs?

I'm a 14 year old girl and I am 5'2 and thin. Over the summer, I grew from 5'0 to 5'2 and now I have big, ugly stretch marks on my legs. It has been 2 1/2 months since I finished growing, and I have tried aloe and Palmer's lotion for stretch marks, but nothing has helped. What is the best thing for me to do? Something that will actually get rid of them quickly, because I am going on vacation in a month, and I would LOVE to not be self conscious in a bathing suit! Thanks in advance!