Teeth were longer before but dentist grinded them down, also because i had a small chip on front tooth. now occasionally my front teeth come in contac?

No worries: Once your tongue and muscles of facial expression get used to the adjusted length by information exchanged to the brain and back will you feel normal again.

Question ?: Are you in pain? Do you grind your teeth? Were your front teeth chipped? Were your restorative options discussed before your teeth were reduced in size? If you are a bruxer, then a night guard might be indicated. All the best..