Weight loss on birth control

Helen • 23. Staying gold.
I'm trying to lose 30 lbs I have gained since being on birth control. I started putting on weight gradual when I first started birth control. Then I got into a serious relationship and then got comfortable so I put even more weight on. Here lately, I've been trying to eat right and exercise but it seems like it's not coming off. I was just wondering if anyone had any advice on losing the weight.