My world is corrupt after downloading 1.18.

My world is corrupt after I use the new caves update. I can't mine blocks! If I throw out a item it disappears. I can't sleep in the beds! I'm having trouble swimming  and getting out of the water! I can't  use my rockets to fly! I'm sure there is more, but I turned off the game after that! Please help and fix these bugs! Cause I don't want lose my world!