Your heart sinks, and you think about everything that will go wrong: you'll be unable to walk, unable to feed yourself, your hands trembling, drooling, unable to swallow.
Tu corazón se hunde, y piensas en todo lo que va a salir mal: serás incapaz de caminar, de alimentarte a ti mismo, tus manos temblando, babeando, incapaz de tragar.