If you have an enlightened GP, especially one with gynae specialism then you can get it prescribed locally on NHS as I do, but as YorkshireGirl says you should have follow up blood tests of T as well as SHBG (look up if not familiar!). However when I first had it prescribed it was from a specialist 5 years ago although my GP will prescribe it anyway. If your GP won't then yes ask for a referral and you should not need to pay. Unfortunaely there are no guarantees with products prescribed off-licence.
Hurdity x