Dear Brother,
From your message i understand that your wife got the medical request on Oct 16 and she has done her medical on Oct 18, Am i right about it?
I believe that first CIC has to approve the medical, it will take around 2 - 4 weeks. (This I understand from other applicant's Timeline)
Secondly, after the medical passed then again 2 - 3 weeks.
Then finally CIC will ask for the Passport Request. So wait patiently and pray to god.
I can understand your situation about waiting, it's is long and frustrated. Because I am facing the same situation like you. I believe most of the people who write in this page are facing the same problem.I applied for SOWP on May 26 - 2017 and still now no update.
I wish you all the best. Good luck.