Shirk in the mind repeating

Assalamu Alaikum Warahmatullahi Wabarakatuhu, Lately I have been having thoughts of shirk pop into my head. The other day I was daydreaming and imagining myself talking to someone and In my mind I swore by something other than Allah which is shirk, except it wasn’t intentional I was just imagining me talking to someone and then all of a sudden I swore by something other than Allah. It just popped into my head as soon as I had the thought I started saying “Astaghfirullah”. Nothing was intentional and it keeps happening to me and replaying in my head. Have I committed shirk?