McGill is the topmost University in Canada. Be carefree from the point that they are going to reject your permit. Also, Congratulations.
Secondly, regarding your Medicals, first of all confirm with the doctor if they have sent your reports already and when?if your Paramedical was all fine because some times, if there is some little complication in cases of Blood Pressure or things like that, CIC recommends additional tests.
For instance, if one has a high BP, CIC asks for an additional tests for kidney functioning. Just to make sure that the High BP is not arising from a serious issue.
After making sure about all these things,
write an email to CIC with your application number and date of filing, ask them about the current status and the action required. They are responsive, but yes minimum correspondence is advised. Dont email them again and again.
All the best.