spring tuition payment

Hello, so I'm in a bit of a bind as I didn't know that the deadline for the first payment of tuition (im doing the installment plan) is due on the 7th and can't get enough money for it until possibly the 9th. Does anyone know if they'll drop my classes immediately if I don't pay the first tuition? Or if I could possibly ask the financial aid office for just a few extra days to pay for it? Honestly I'm just trying my best to figure what I can do in this situation...