The USPTO should have sent you a Notice to File Missing Parts, in which you'd be asked to pay the fees. It should have a 2 month deadline to respond from its mailing date. You can pay late fees for up to 4 additional months.
The Notice typically goes out within about 1-2 months of your filing. So, the 2-month deadline should be coming up soon or may have just passed. But you probably only need 1-2 months of extension to respond -- not too expensive, but 3rd and 4th months get expensive.