Help please

Right so I’m on the mini pill I think I’ve nearly finished 2 of the sheets that the doctors gave me they told me to ring up and book an appointment for like a check up or something when I finished the second sheet so I did yesterday and they said that they were full until like the middle of August they said a doctor will ring me on Tuesday but I was talking to someone that works as a receptionist at a different doctors and they said I should have booked it with a nurse because they need to check your blood pressure and everything I need help because I don’t really understand what to do do I still get the doctor to ring me or do I go in and see if I can get a nurses appointment and will they be able to like prescribe more to me I’m so confused? Xx