Most likely the judge has ordered a presentence report that will be used at your sentencing hearing. Your case will be assigned to a U.S. Probation Officer for the preparation of the presentence report, which will include a personal interview with you.
If you were released on bond with pretrial supervision, you are still required to report to your U.S. Pretrial Services Agency Officer until you report to prison. Failure to abide by these conditions after sentencing could result in arrest and remand for immediate service of the sentence.