am i a kaffir because i use the word "jesus" when I'm tired or shocked?

sometimes I say the word "jesus" when I'm shocked or tired because I've seen a tv show or a youtuber say it and I don't really think when I'm saying it, I've only questioned it recently. so, am i a kaffir and should perform ghusl because i replaced calling for god with jesus, or should I just watch my mouth?!