Stretch Marks!

I've been struggling with stretch marks for years! Basically since I hit puberty and my 'curves' began to fill in. When I was about 12 I had no idea what I was getting was stretch marks. Well no they're covering my bottom, breasts (not too much there), calves and thighs. Well now I've been working out and getting gains on my thighs and bottom and getting more stretch marks! I apply stretch mark lotion religiously, hydrocortisone (steroid), baby oil, coconut oil, mederma, take a multivitamin and a hair/skin/nails suppliment. Seriously everything!! I'm drinking tons of water! And I'm still getting them, and nothing helps. I know they'll never go away, but isn't there anything I can do!?