Viewport frozen

I have a problem. I just turned on unity and the viewport is stuck. I cant rotate and i cant zoom or look around. I cant even focus on anything. And the 3 buttons that turn on/off the shadows and the grid are gone also. Need help please.

Are you sure you are not looking at the “Game” tab instead of the “Scene” tab? (sorry, but I have to ask)

If these 3 buttons are missing, what ese is there instead? Do you see the game grid, the camera icon, etc., or nothing at all?