Oh boy! Okay. You might either get a request from IRCC to get a new medical exam done or in some cases, the medical validity of your current medical test might be extended by them (I think I've read about such cases in the past. I'm not really sure though).Also medical will expire on 3rd Nov. My consultant will raise CSE for that.
Good luck man - Hope you see light at the end of the tunnel soon! All the best!