Pslf loan just came out of forbearance and I can't afford the payments

I owe just short of 90k, and I'm on IBR, but even with that I cannot afford the 580/ month I suddenly owe... what can I do and still qualify for pslf? I was anticipating maybe 300/ month.... this is an absolute disaster and eats up basically everything I save a month. I just had a baby, I'm married, and our expenses are as low as we can get them. I make a pretty decent salary but now it's like I need double what I make to get to a comfortable place...I need help and I don't know what to do...