Why won't the sound on my iPhone work? No music, no text tones or ring tone.

This morning my phones sound did not work when I plugged it into my car to play music. I unplugged it and realized none of the sound was working. No ringtone, no voicemail, no phonecalls, nothing. After playing with it and restarting it a couple times, it would turn on after static noises but then turn back off after a few seconds. At night I charge it on my iPod speakers, could that have caused the problem?