Bismillah
salam Khadija welcome back Alhamdulelha u r better
Khadija what kind of dreams u wont be able to fulfill when u r married? probably your dreams insh a Allah will be fulfilled with your future husband. People just have to have something to say.
Getting married at a young age is the best, u get your children when u r young, when u still have patience and Insh aAllah ability to shoulder such responsibility.
If they are talking about career dreams, well how about job description:
Virtuous wife/mother :)