I accidently clicked on the wrong button

I clicked on the wrong button and it changed the entire editing workspace to where I cant find anything, not my videos nothing. I n the other workspaces i am able to see everything so im sure my dumb self did something really stupid, I recall it being one of the panel buttons but i dont know what to do now this is for school and my first time using it and i feel so stupid and dumb so please help no judgement please