Worried about weight gain

I know this sounds so shallow, but I'm starting to feel unsure about ttc bc I don't want my body to change. I don't want to gain weight and I don't want my body to get destroyed. I am a dancer so I have a little body dymorphic disorder going on. I already feel like my body isn't what it used to be, and I'm worried having a baby will be the end of it. I know lots of women look great after pregnancy, but what if I am not so lucky? I also am so sad when I think about stopping my more extreme physical activities while pregnant. Being very active keeps me sane. Does anyone else feel this way or have advice?