Mobility Worsening Day by Day - Help and Advise Needed..

I need some help and advise.. I cannot believe that this is happening to me! I've gone from Athlete to invalid in less than two years. I can barely walk.
Saw the Rheumatologist last week; he showed me the X-Rays of my Hips,, knees and ankles; they all show signs of degenerative Osteo Arthritis. I asked if I needed hip joint replacements? he said he had seen a lot worse; and didn't think they were at a stage of needing to be replaced, he also stated : He couldn't understand why I was having so much trouble trying to walk; even though I cannot put any load-bareing on my limbs. had a few more X-rays done and he's referred me for a Body Scan. 

I'm finding it difficult to understand this disability; I'm taking all sorts of vitamins and supplements to aid a healthy body; and some herbs to reduce any swelling; also painkillers. I'm at a stage where nothing seems to help; and each day is getting progressively worse!

I sometimes wonder if there is something else wrong with me, apart from the Arthritis and Pernicious Anaemia? I'm struggling with my mobility. Does anyone know of some kind of pain relief guaranteed to help me walk properly?

Any help or advise appreciated

N