Thoughts?

So when I was in high school, I was always a size 0. I struggled finding pants, dresses, you name it, I couldn’t find it in my size. I am nearly 6 years out of high school and have gained a little bit of weight over the years. I am now I size 2 or 4 in clothes. This has been really hard for me to accept. I know this is normal and now I am at a healthy weight but just need some reassurance I guess. My diet hasn’t changed and I was on the pill for 2 years and going on having an IUD for almost a year!