Mouth Piece Mic is not working at all

I dropped my iPhone on the top. Was in a good case. No physical damage to the phone.

The problem is it wont pick up my voice unless using the speaker phone, when using phone, record, or anything.

Siri no longer has a voice either. when playing music sound comes out of the bottom speakers fine.

I cannot find a mouthpiece mic in any parts list for the 4s.