Hmm, it sounds to me like perhaps this situation is more serious than simply catching up on payments. Is paying $200 a month going forward, plus your other financial commitments, tenable?
Definitely do check the terms of your account with your creditor to find out about penalty APRs as others have suggested. However, you might also consider checking out NFCC.org https://www.nfcc.org/
to help with your overall debt problem.
Maintaining good credit is important, but it's also important to be honest and realistic about your situation. Is this something you can fix on your own going forward or has it escalated to an unmanageable point? There are non-profit, debt counseling services in place that may be able to help you reduce your APRs and simplify your debt repayment through a debt management plan. If you go that route, make sure you do it through a non-profit service. Fees should be very low or completely non-existent depending on your income.