Karla,
I question the idea of Osteoporosis being a problem unless your at an advanced age. Though, it may not be completely improbable.
I actually developed Osteoporosis at age 46 (near as it can be determined anyway). It was brought about by low testosterone naturally occurring in my body and not being known. My Dr. thought at first my low energy levels were the result of anemia. However, after a chance encounter with a bone scan device and it's subsequent preliminary results, I went in for a full bone scan and it was confirmed that I actually did have Osteoporosis.
That is when I made a full blown effort to get HRT started with estrogen. Soon afterward I was in fact started on HRT, though without the use of an anti-androgen. Since I already had such a low "T" number and it was continuing to fall, an anti-androgen was deemed unnecessary. There was a whole long sorted bunch of details to go with this story, but, I don't wish to bore everyone with that.
The point is though, in my case, estrogen along with diet change, more exercise and making certain that I have enough calcium intake have reversed the effects of Osteoporosis.
The pain part of your inquiry I can only attribute to possibly the type of "E" your taking? I started out on Premarin. And, it did cause me some discomfort in my lower body area. After researching the nasty-ness that is Premarin, I asked my Dr. to switch me over to to Estradiol. Within days, the discomfort disappeared. Was it the Premarin, or something else? I can't completely say.
Dawn