Terrified.

I am a 19-year-old in dire need of a hip replacement.
I know the risks involved. I am by no means a naïve little girl.
I also know the risks involved if I do not get a hip replacement.
My bone is brittle. It has been brittle since last september. I had an infection in the femoral head that has eaten away the cartilage in the socket and now have severe arthritis. I walked with crutches through november into december. I walked (after a bad hip pinning) with a walker for two months, crutches for one, and a cane for about a week. Then I had a relapse in april. I went back to the crutches for about a month and half, and have since been using the cane. I was doing well until my (new) doctor told me the other day that using the cane when there is no cartilage has begun to erode my pelvis. Within a year, even on crutches, the pelvis will be so eroded that, to do a hip replacement at that time, as I had planned, would be far more risky as it would include a bone graft which might not fuse. He wants me to have the surgery as soon as possible.
I was fine with this information, too, until he told me that, if the hip doesn't take, I will be wheelchair-bound without a portion of my hip.
Basically, I am scared out of my mind. I know I have to do it. I even want to do it. I am sick of being in this much pain all the time. I know that I am young for a hip replacement, but what choice do I have? I have been following my doctors' orders for ten months now and nothing has worked. I need reassurance. I need people to tell me about their success stories. I know it won't necessarily apply to me or that I won't necessarily turn out the same way, but I just need the comfort. I'm the only one I know who has had to go through something like this, and my friends just don't understand. When I bring it up, the room goes quiet because nobody knows what to say.
I'm just so tired of feeling alone.