MY WORLDS ARE ALL GONE!!!!
you mean your worlds from Adrift? They are incompatible with Redrift, so they can't be loaded up.
If you could load those worlds previously (within a few months ago) and they are suddenly inaccesible, i'm not sure what would cause that.
if it has been many months since you played, either I changed the file path (meaning your old saves still exist) and can be found at Users\YOURUSERNAMEHERE\AppData\LocalLow\Redlabs + Microman502\Redrift\saves
or, you are playing on the web build, and as far as i can remember, the saves there get wiped every update (so, play on the downloadable PC version)