Hey Kiera. Can you do a network reset on your device? This step will revert your network to its default settings, which might solve the problem by disconnecting your Surface Pro from all network connections and forcing it to reconnect again.
- Select the Start button.
- Select Settings > Network & Internet > Status > Network reset.
- Select Reset now. Wait for your PC to restart, then test the internet connection.
Once you've reset your network, try signing back into it. Let me know what happens.