Broken shoulder

Seven weeks ago I had a spectacular fall over a badly placed suitcase. Broke in three places and displaced the collar bone. All seemed to be going ok until couple of days ago. After exercise my forearm goes cold and I can't make a fist. Looking up symptoms it looks as if I have a compressed radial nerve. Physio says to rest it, done that but symptoms return. Do I go back to trauma clinic or rest again and wait it out. Would love to hear your thoughts and any advice would be welcome. I live alone and am a bit fed up with it to be honest!