Why can’t I stop having conversations in my head?

Hey everyone, I hope you’re doing well. Lately, I’ve been struggling a lot because I can’t stop having conversations in my head. It’s like I’m constantly daydreaming or imagining these weird, unrealistic situations and it’s making me super anxious. I can barely sleep sometimes I’m awake for over an hour or I keep waking up multiple times at night. I thought meditation would help but I’m still stuck in this cycle. I’m reaching out to see if anyone has tips to deal with it. Any help or suggestions would mean a lot. Thank you.