You were supposed to hand in the E medical sheet for your upfront medical when you submitted the application... They will only ask you to submit the medical certificate (eMedical) later on if you do a "regular" medical exam. In that case, you'd have to fill up a medical exam request form stating that you wish to do a medial exam, and the visa officer processing your application will send you instructions on how to do a medical exam. In your case, however, you already did the upfront medical, and as such you should have submitted that at the very beginning. The visa officer will most likely contact you to have you send the eMedical certificate. Keep in mind that this may result in a delay since it was not uploaded earlier.
