You will have to change the blade and arm if you are going to go to 22". I would get the Bosch wipers (sold in most auto stores). They come with the universal connections, so installation is a snap.
I am concerned that you are doing a "Band-Aid" sort of fix, but I guess you will attack the problem at a later time.
Your biggest concern should be that even though the wiper will clear the top of the windshield, you will lose a great deal of wiping radius when the wiper travels to either side of the windshield...that is where your visibility is most crucial.
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car