Terrylene is right. You can safely use HRT within 10 years of the menopause for maximum benefits to the heart, but you can also use it at any time- even after 60, for the first time, but you'd start on a low dose then.
It's NICE guidelines that early meno should be treated with HRT.
Is there any way you could see a gynae privately in the UK? Do you come over here? (I can suggest someone if you do.)
I think it's a bit odd that in Spain women can buy HRT OTC as in the UK you have to have at least one consultation a year with your dr to ensure all is ok.
I would advise you have a DEXA scan as a baseline. Privately this is about £250 but they only need repeating every 3 years.
You need a full scan of your hips and back (not one where they just scan your heel.)
It's almost impossible to advise you to which HRT you should buy because they are very different types and doses. Most women start with 1mg oestrogen (plus progestogens ) then increase to 2mg if necessary. If your bones are thin already you would start on 2mgs dose.
As you are post meno you could have a type with continuous progestogens so you don't have a'period' on HRT but you could still use the type that follows a natural cycle and gives you a monthly bleed.
Have a read of MM site but really, you should try to see a dr for your first prescription. You need to sure you are ok to use HRT .
Also read the Daisy network site. If you go to the menu tab and select POI (what is it, diagnosis, etc) there is a link to a doc you can download which is all about treatments - think it's the 3rd or 4th option on the drop down menu under POI.