Is my iPhone hacked?

I watched some videos online and I think my iPhone is hacked but I need a little help since I’m really bad at things like this. First of all, the trusted device list is not available and I remember that Apple should verified your old Apple ID password before changing a new one but it takes me to the changing password page right away before verifying my old Apple ID. Second, it took some screen shots that I don’t remember I did. Last of all, my iPhone sent an message to my friend on discord while I was typing her (the message that I sent was a message that I copied earlier.) if my iPhone is hacked then what should I do? (I changed my phone last month because my old iPhone was acting weird. I’ve changed a new one since I’ve used it for 4 years. )