Guess it depends on your character's stats. I know you can reroll the stats on your items if you like and if you don't like the outcome you don't have to apply it, but you still pay the cost of the reroll. Really not sure if it's the same for a character, so if you have anything invested I wouldn't do it until finding out for certain. What are your stats anyway? Might not even need a reroll, probably just need better equipment. Good luck either way.