Formal Sickness review with boss

& HR manager and team leader (IF) you can call her that .,,,,,,,,,, questionable. Anyway, they obviously don't believe me, want me to go see GP and ask her to sign me back to work..............all they did was keep going on about going back to work. I voiced my concerns that my leg might not be good going back, promised me the earth that I can rest it (some hope with my team leader) I know that won't happen. BUT reckon I will be back (unfortunately) W/c 5th. Do have a consultants appointment for 8th (I believe if sorted today) - I just hope that I can get back up to speed and leg sorted for Christmas - I think they will really put pressure on me when I am back. Nightmare really.