Osteoarthritis or Peroneal Tendonitis

Hi everyone, I am new to your website, but was wondering if anyone else had had any problems being diagnosed. I have had trouble walking for a few weeks, pain underneath outside of my foot, pain in ankle. GP x-rayed ankle (not the rest) and said I have degenerative osteo, podiatrist says peroneal tendonitis, physio didn't know. All I know that it's very painful and stopping me getting about, including driving. Any help would be appreciated. Thanks :)