Femeston 2/10 is a sequential HRT so you have 2 weeks oestrogen only, then 2 weeks with the added progesterone, which will bring you a bleed at/towards the end of the pack. When you started your HRT were you still having periods of your own?
If you mean Elleste conti duo, did you get a bleed with this? I think its actually a continuous combined - they generally give this to post menopausal ladies or if you've been on HRT for a year I thought. Did she give you a reason for changing?
In terms of the "how do you know when you've reached menopause" I am in the same boat as you, I have no idea where I am because I've been on HRT for over 2 years. I've had to stop my regime temporarily (and boy do I feel it). I suppose you would have to stop it and see how long it was before you had a bleed/any symptoms? x