Welcome to the forum.
Please tell us about your mic. Is it USB? Unfortunately, Adobe programs do not work well with many USB mics.
What are your equipment (Audio Hardware and also ASIO) settings in both the OS and in PrPro?
Does the mic work with other Audio recording programs? This can be a partial test, but if USB is no guarantee that PrPro will work with it.
Good luck, and let us know a bit more, please.
Im using the Built-in Microphone.
What are the settings in your OS, and also your hardware settings in PrPro?
Issue sounds a lot like audio feedback to me.
Try : Muting the speakers in the laptop.