If they implemented Rage properly, this would not be a problem. Sadly, they have not done so.
If Rage was done correctly, it would not end until the start of your NEXT turn, if you didn't attack and were not damaged at all during the *entire* next round.
However, as Larian have implemented it your rage ends immediately when you end your turn, if you don't attack - massively limiting what you can practically do while raging.
