Millions of federal student loan borrowers are seeing their balances increase Friday as interest charges resumed for participants in the Saving on a Valuable Education (SAVE) plan.The accruing interest follows a year of zero-interest forbearance and comes amid ongoing restructuring of the nation's student loan system under new legislation and legal pressure.

For the past few weeks, Cara Burgess has been panicking about her student loans.

Millions of borrowers in forbearance through the SAVE plan will see interest start accruing on Friday. Here's what to know.