It appears that GPs are prescribing the cheaper oestrogen rather than 'vagifem' or 'ovestin'. Some ladies require both, the latter smeared on the labia/vulva.
I would ring the Surgery and ask for 'vagifem', then insert into the vagina every night for at least 3 weeks. Steroid creams should be used with care.
Do U have any underlying conditions that cause thin skin?