phone sounds outside car

[eak]

i suddenly started having an issue with my phone. i called a friend on it and he could not hear me speak (phone was fully connected), but i could hear him fine. i tried to call him again when we met up a little later and he said that he could hear me outside the car as if there were speakers outside the car. can't figure out what changed all of a sudden and why it's doing that but i can no longer talk hands free.