Hi again - no problem about replies - I don't manage to look at all the sections of the forum anyway! Well I'm surprised you got Prempak-C as it has disappeared off the list of HRT types and presumably has been discontinued? Not an ideal one to start in that case because then if you like it and try to get more you will then have the problem of changing to another one.
While low oestrogen can cause joint pain - if your cycle is still that regular and you have no other symptoms I must admit HRT would not be my first thought - but your GP knows you and I presume s/he has done other tests re joint issues and blood tests eg thyroid function, vitamin or mineral deficiencies etc? If s/he thinks low oestrogen might be the cause then it's definitely worth a try. Maybe you are already taking other meds that might mean you don't experience flushes and sweats eg anti-depressants. Women taking these may not experience menopause in the same way as the rest of us due to the potential lack of the first obvious signs of oestrogen decline or hormonal fluctuations (ie flushes and sweats).
If you do decide to take this one - try not to worry and hopefully your pain will be eased soon - must be miserable for you.
Hurdity x