Thanks @ leisa!
Yes this just happened to me and my spouse very recently (just got resolved last friday) This is the steps I took to try and be proactive about our medicals being found.
First step: I scanned and resent the the copy of the receipt I had (IMM 1017 -medical report) As well as copies of completed x-ray, blood test, and medical we got for our own personal records. What I also did before sending the email was phoned the medical office, got the date it was sent to the DMP (in our case, ottawa) and by which company. Push them to give them a copy of the confirmation that your medical was recieved by your DMP.
I did then did more research on the subject, its not a common for this to happen, but its also not uncommon for this to happen either. I then decided by some other threads I would contact the DMP and try to get them to send my spouses medicals. Some people claim this worked for them and they got an email from Ottawa back after a few days, but that never happened for me.
What I did next is what I think helped a lot. I called our medical office again. I wanted to see if two different people would tell me two different times they sent our medicals which would be a huge problem. I ended up talking to a wonderful lady. She had 30 years + of experience and broke down to me how the whole medicals work. This is a whole other post, if you want some info on that PM me. We decided that we would wait a week or two to see if our visa office could resolve this on our own, or else she told me she would resend them.
Two weeks past, nothing, so I called her and she put together an email and resent my spouses medical. I thought I would hear back a week or two later, she ended up getting a response that same day said that basically our VO office was also looking for our medicals and that they have been forwarded. Then just yesterday, I checked my spouses e-cas and it said medical recieved.
This is a big pain, but with some proactive steps on your part it is possible to get it resolved quicker.
If you have any more questions, feel free to PM me, and goodluck!