WhatsApp is there an activity log for iPhone?

Hello,

Yesterday one of my chats suddenly showed “you turned on disappearing messages..” and I know that I didn’t do this. Is it possible that is either a glitch or to see at what time exactly this was activated? It just shows like the info that the messages are encrypted so I can not see when it happened. I was asleep and someone accessed my WhatsApp and I’m wondering if he turned it on or if it’s a glitch, since I know for sure that I didn’t do this. I tried contacting WhatsApp support and on Facebook to see if there’s any kind of activity log but it doesn’t look like they’ll answer me anytime soon..

(This is quite personal because this just lead to a breakup..)