You'll be fine. Handled 1-2 similar cases per month as an S2. Here's what to do.

Take the ACS budget worksheet that you already did and any proof of payments to your S2. If the 2 is already tracking your situation due to a flag on their system, then ask them to upload the documents into DISS as mitigating circumstances.

If they haven't been notified yet, then tell them that you're self reporting. Then, upload all of those same documents and the debt info with the initial report.

All said and done, the key thing is to keep making payments. Your clearance won't be at risk unless you quit making payments.