Here is the section in the NICE guidelines that you could print off and show you GP if necessary.
Urogenital atrophy
1.4.9
Offer vaginal oestrogen to women with urogenital atrophy (including those on systemic HRT) and continue treatment for as long as needed to relieve symptoms.
1.4.10
Consider vaginal oestrogen for women with urogenital atrophy in whom systemic HRT is contraindicated, after seeking advice from a healthcare professional with expertise in menopause.
1.4.11
If vaginal oestrogen does not relieve symptoms of urogenital atrophy, consider increasing the dose after seeking advice from a healthcare professional with expertise in menopause.
1.4.12
Explain to women with urogenital atrophy that:
symptoms often come back when treatment is stopped
adverse effects from vaginal oestrogen are very rare
they should report unscheduled vaginal bleeding to their GP.
1.4.13
Advise women with vaginal dryness that moisturisers and lubricants can be used alone or in addition to vaginal oestrogen.
1.4.14
Do not offer routine monitoring of endometrial thickness during treatment for urogenital atrophy.