Dear @Danielle DiCristino,
Thank you for posting your question in the Microsoft Q&A forum.
We apologize for any inconvenience you may encounter when using our services/ products.
Could you please open the Phone Link app again and re-scan the QR code using the camera option in the Link to Windows app? This is the quickest way to re-establish the connection. Phone Link requirements and setup - Microsoft Support
If your immediate goal is simply to copy photos between your phone and your PC, using a USB cable is often the fastest and most reliable option.
Also, could you please confirm whether you are using an Android phone or an iPhone (iOS)?
The information you provided will help me assist you more promptly and efficiently.