What is the best form of contraception? One that doesnt make you gain weight

Since dating my boyfriend i started taking the pill in May 2023 and got told by people that initially the pill can cause extra fluid or make you gain weight in certain areas for the first 6 months of taking the pill as your body adjusts and gets used to it. I never binge eat and my thighs and arse are generally big anyway but today i took a photo of myself and cried because of how i look. Is this a result from taking the pill ? I have never been on it this long and never looked like this. What is the best contraception that doesnt make you gain weight ???