Hi Bev,
I've always had very regular periods up tilll about 12 months ago when I started missing them.They weren't late, just missed a complete month. this happened 3 times.I mentioned it to my GP who dismissed itm,said it was stress,depression etc and put me on anti-depressants. I came off them 5 months later, still felt odd, went to a new GP as the physical side, headcahes etc were bad too.They thought it was an underactive thyroid and ran various blood tests. My FSH levels were very high- 46.9,they wouldn't diagnoze off 1 test due to my age so repeated the test 4 weeks later with similar results.
She then put me on HRT.It's strongle recommended before 45 because of osteo risks so I've no experience of GPs reluctant to prescribe-more the opposite!