weight

I'm 18 and 11 stone 11 pounds, I've struggled with body image and eating since I was 11 and so don't often weigh myself because it only contributes to further negative feelings around food. I thought I'd lost weight recently so thats when I weighed myself, and I was surprised by how heavy I am. My jeans are uk size 10 and my tops are uk 8-10, I'm 5"6. I dont look like I weigh that much but I dont know what to do, I've gone down clothes sizes but still weigh what the NHS would say class as overweight.