Stretch marks :(

Sooo I literally JUST noticed these stretch marks on my lower tummy.. I have NEVER noticed them before today. I started juicing 3 days ago. Could this somehow be why?? I thought you got stretch marks when you gained weight.. :( does anyone else have these? I have NEVER been pregnant and have almost always had a flat tummy up until I put on 20 pounds, but I never had stretch marks... im devastated :(

Also does anyone have any suggestions for what creams or whatever I can do to fade them?