Stretch Marks

I'm 12 weeks pregnant with twins tomorrow. I'm already having horrible stretch marks and it's really bothering me. I use to have a problem with my weight and with eating about 4 years ago. My habits have become a lot better but the weight gain and stretch marks are really starting to freak me out! I know that I'm carrying two beautiful lives and I have an amazing husband who loves me no matter what I look like but I can't help but get down about it. Hopefully others feel this way too cause I'm starting to feel crazy haha!