Final answer:
You can create a new DS-160 form even after an appointment is scheduled. You should bring the new form's confirmation page to the interview and inform the consular officer about the change.
Step-by-step explanation:
Yes, you can create a new DS-160 form if you cannot retrieve the confirmation page after the appointment is scheduled. The DS-160 form can be filled out and submitted again if necessary. However, if you have already scheduled an interview with the U.S. Embassy or Consulate, you should bring the confirmation page of the new DS-160 form to your interview. It's also advisable to explain the situation to the consular officer during the interview. Keep in mind that each DS-160 submission generates a unique confirmation code, so it's important to have the correct one associated with your interview appointment.