Helloo, i have just had a BA on 31/07/19 i was required to have a doctors note sent from the cosmetic group.
It is basically just to see if your in the right frame of mind to book your surgery, nothing to worry about. I did panic thinking it was bad but i booked in to see the doctor and requested my patient record which displayed what meds i had been prescribed and my previous appointments.
Id mention to your GP in the appointment they have requested the info and what he thinks. You will be fine.
Hope it all goes okay and if you need anything pop me a message:) xx