Is it too late to file a petition with the courts after a chapter 7?

It's not a good idea to file bankruptcy without an attorney. The case can easily fail, and worse yet, you can end up losing money or property if not done correctly.

I am not sure I understand your question. The petition was filed when you originally filed the case. You also had to file Schedules and a Statement of Financial Affairs. There would not be another petition.

In order to file a bankruptcy you had to file a petition.

The "petition" is part of your bankruptcy filing. The case would be dismissed if you did not include it. I recommend that you hire an attorney to help you through this process.

Per the bankruptcy code, a 'petition' must accompany the opening of any case, with a complete list of creditors (matrix), or the case will dismissed automatically by the Court within a day or two of warning. Thereafter, the 'balance of schedules' must follow the petition and creditor matrix within 15 days of the case opening. Given the date shown in this hypothetical situation, the case should have been automatically dismissed by the Court on or about May 14, 2012. It is important the petitioner seek competent counsel in the petitioner jurisdiction to determine qualifications and rights under Title 11 of the United States Code.

You need an attorney for bankruptcy, doing it yourself you run into problems like this. You had to have filed a petition or the case would not go anywhere. Find out from the bankruptcy clerk whether you filed a petition or not. Very odd question.