In the balcony love scene several of juliet's speeches convey a sense of foreboding which fear is not mentioned

This love will result in her death.

Mostly in the balcony scene Juliet is worried about the fact that if Romeo is caught in her backyard he will be killed by members of her family. She is also afraid that she is coming across too forward and will seem to quick in her profession of love for Romeo. She never though, thinks that this will turn around and cause her own death though.