Hi francheska64,
Thanks for posting your question! We see that you have the orange dot indicating that your microphone is in use, but you don't have any open apps. We'd like to see how we can assist with this.
To double-check, you've fully restarted your device and you've verified that no apps are open in the App Switcher, correct? Switch apps on your iPhone, iPad, or iPod touch
As a test, if you open the Voice Memos app, are you able to record and play back audio? Make a recording in Voice Memos on iPhone
Also, do you have any headphones connected? Does the same thing happen with headphones connected and disconnected?
Let us know. Kindest regards.