Did you happen to speak about it with anyone, a friend or family member?
Your phone hears everything you say.
I was talking about a band that I had not heard in a long time and decided to do a search on it... the band name popped up as soon as I opened the search engine.
Even if you were just having a conversation with yourself, your phone still heard it.
And, I forgot to mention, if you brought your phone into the doctor’s office, it heard the conversation between you and your doctor.
I’m to have surgery soon and I told my doctor that I want to watch youtube videos of the surgery. So far, youtube has not suggested any videos of that surgery. (On my hand, for severe osteoarthritis.)