Why can't I see my hotbar in minecraft?

I was playing yesterday and I might have pressed a button but my hotbar, hand and crosshair was gone. I pressed almost every button Imaginable and fixed nothing.
I pressed F1 and it only opens up windows explorer.
I play on windows 10 edition and never had this problem.
I waited a day to see if it would clear up and nothing happens.
I went on my other worlds and I have the same problem.

(Edit): Thank you everyone the problem has been resolved. Thank you to the people who took the time to help me out!