Unanswered calls appearing in my messages

[smooth4lyfe]

Whenever I call someone and they don't pick up (even numbers not in my contacts) they appear in my messages, as if its a call log or something
Is this happening to anyone?
It wasnt doing it before then it just started doing it...I don't remember pressing anything
Anyone know what it could possibly be? Or where in settings deals with sending unanswered calls to messages