Assuming you are going back for a graduate degree, I would not take out extra $$ to pay towards your current loan. Current fed loan interest rate are at 6% and no subsidized loans for graduate or professional degrees. So you’d be borrowing at 6% to pay off 5.2% loan.
Whether or not you plan on going back to school I would refi. If you plan on continue working, just keep your current payment and pay it off early, saving yourself some interest. But sounds like you’ve got a decent plan on tackling the debt. Will going back to school help advance your career so you can pay this off faster?