Should I Go For A Follow Up Checkup After Being Treated For Sleep Issues?

During the later part of my senior year of High School, approximately 3 years ago, I had some issues sleeping for around a week. I visited my family doctor and he wrote me a prescription. After only a few days of taking the medicine I was able to get back into a normal sleep cycle and discontinued use. I ve almost finished college and I m now working on enlisting in the military and I need to provide documentation from my doctor to verify I haven t had any subsequent issues. Since I didn t have any other issues I never followed up with my doctor about the issue. Do I need to make an appointment to speak with him about symptoms I don t have or is this something I should be able to get by making a call and stopping by? My doctors out of the office today so I m just wanting to know what to expect.