My DD was head down until 34 weeks then went breech.
You don't have to have an ECV (where they manually try and turn the baby).
I did have it, it didn't work. Its only about 50% effective and there is a very small chance that the baby can become distressed and you will need an EMCS straight away (its about a 1% risk).
Word of warning, if you do have it, it is bloody uncomfortable. I just laid there with my eyes shut and gripped the sheet. Even the MW was cringing but DD was being very stubborn and just wouldn't move, some babies do turn straight away. They inject you with a muscle relaxant which can make you a bit shaky, coat your belly in olive oil then the consultant 'lifts' the baby from your pelvis and tries to move the baby's head down. You will be monitored for a short time before and about an hour after to check the baby is ok.
I had a CS 4 weeks ago, I was dreading it. Turned out to be an amazing birth and if I have anymore, I will have another one. DS was a forceps and 3rd degree tear but I still wanted to give birth naturally again
. I'm glad DD didn't turn. 
You can also have a breech birth but the risks are slightly higher to the baby than a CS and you would have to have someone who is happy to deliver a breech baby. The consultant did say I had a choice but after DS's bad birth, I didn't want to take the risk of a breech birth.