Write a date-ordered account of facts you know firsthand. Include symptoms, visits, providers or facilities, instructions, medications, and changes in the patient's condition.
Distinguish observations from information another person provided. Say when a date is uncertain. Connect each event to available records and note who was present. Date and sign the version you provide to the office.
The chronology does not need medical conclusions or accusations. A precise account of what happened, when, where, and who participated is more useful. Preserve originals and provide complete, legible copies organized by date through the channel the office specifies.
The answer for your situation depends on the facts and records. An inquiry does not suspend legal deadlines or guarantee that the office will accept the case.