"GP did not prescribe iron tablets to…"

We(I, wife and son) registered with Cranbrook Surgery last month(Dec 2023) as we shifted to the Gants Hill area and had an initial health check as well. My wife is 37week 5 days pregnant. Since last month she has been taking Ferrous Sulphate 200mg tablets twice in a day as per midwife prescription. Yesterday the midwife checked her iron level and confirmed that it is low and she needs to continue taking tablets till pregnancy. In our previous GP which was forest GP it was very easy to get the medicine from the pharmacy. Today on 11th Jan 2024 we called Cranbrook surgery to prescribe the tablets to the pharmacy. Initially we were asked to visit the GP with a Maternity file and a medicine prescription. When I reached there I was told to book the appointment with the Doctor and the next available appointment is after 10 days. I am not sure how we can wait for 10 days for an iron tablet prescription when my wife's pregnancy is due in 3 weeks. This is a really bad experience for us. At one side redbridge council runs various programs to support pregnant women and kids' health and on the other side cranbrook surgery is not handling/guiding the pregnant woman properly.