You need to eat. Pregnancy involves weight gain, and sometimes a lot of it. You do damage to your own body as well as risk your childs health, it is not worth it. How you look on a wedding day pales in comparison to their health and growth.
O and I am 24 weeks and its not that I don't eat, I often eat more than I should but I always feel guilty and terrible about myself afterwards
I can eat constantly without getting full. I wake up in the middle of the night wanting to eat
And it's for a reason - eating when you're not hungry? That's one thing. Being hungry? Different. You're growing life while still supporting your own, it needs the calories to do this and that comes from food. If you didn't need it, you wouldn't be hungry.