in my case medical expires on 5th august and it gave us only couple weeks hardly to leave so if you have more than 4 weeks left, then dont worry, yours must be on the way, however i must say that in my case i strongly thinks that MP inquiry did help, because my file was not moving any where and so far i did two MP inquires at diff times and at each time after inquiry, first time i got the passport request and second time a call for visa issue, (it may be pure coincidental , but i like to thik that way) if you have not done MP inquiry then i would recommend the same..
