Have you actually seen a bone specialist? I could write an essay on this- in fact I have, for work, so it's hard to know where to start.
It's not risk free. There are law suits in the US from people who have had serious side effects, like broken jaws due to the negative effect on bone.
. There was also some research last year in the UK showing that it can cause microfractures of the thigh. It doesn't create new bone- it makes the bone turnover stop, so you don't lose bone, but the bone that is there becomes denser but also brittle.
The medical advice is you take it for no more than 5 years and have another scan after 2 years.
Whether you take it or not depends on your fracture risk- what's your T score? How bad is your osteo?
In women under 60, some specialists would prescribe HRT if suitable rather than bisphosphonates (which is what you have been given.)
I was offered it by my then GP in my late 40s for severe osteopenia (almost osteoporosis.) I read up on it and decided not to risk it. I saw a specialist who told me it was not the right treatment for me at that age and with 'only' osteopenia.
I embarked on an exercise regime with weights, walking etc. After a couple of years I was menopausal and have now been on HRT for 11 years. My bones are now normal though my hip density is slightly below normal.
I suggest you read EVERYTHING on the National Osteoporosis Society website, and if necessary use their helpline.
You are quite young to have full blown osteo.
Did you have an early menopause - before 51-52?