How could a SOS messages get sent from my phone with the feature turned off?

[Tinam62]

Last night my S7 Edge was in the outside pocket of our cooler and 2 text messages were sent from it... "I need help" and a "SOS" with a Google map of my location. My SOS feature has never been turned on. My husband was sitting next to me and got the text messages. My two sons also got the two messages as a group and separately. Luckily because my husband immediately got the text, I was able to quickly call my sons to let them know I was fine. I've read other posts that hitting the power button 3 times activates the SOS feature, but my "Send SOS Message" feature is OFF! Plus the phone was not touched. This has me very upset. How could this happen?