iPhone sending images to people that I never sent

About 15 minutes ago I just got a text message from my Church saying nice picture! I never sent a picture so I was quite confused. Whenever I got to church that day, the pastor showed me the picture and the text showing that I sent that to him. However, in my messages on my phone, it never showed any record of me doing that nor did I have any physical recollection of me doing that. So, how on earth are random pictures of me that I’ve never sent not to mention never took being sent to my pastor using my Apple ID and or phone number. I’ve also had two step verification on my Apple ID and changed my password to something really secure Along time ago so I don’t know how this happened. Please help.