Hello @Ann Naccarato
Thanks for reaching out to Microsoft Q&A Platform .
To answer your question , This could be because your RDP port 3389 is open and it could be exhausted .
Please Navigate to Networking/NSG of your VM and if you see it open like following:
Go ahead and click on this row and update the Source with your current Source ip address{ example your current laptop ip}
Once this is done try to restart the VM and then try to RDP it .
Please do accept the answer if it helps in solving your issue as well .
Thanks & Regards,
Pradeep