I hear you, tctt, and heartily agree about stressful!
When things start happening, they seem to go in a cascade, though, so keep faith! I think they're processing these apps in batches because we see a whole flurry of "Oh, I got my OWP!!" and then "Wow, got my PCC and Sched A" and then "hmmm, medicals!!"....
So yours will likely be in the next batch they get through.
Also consider that the system seems to be having some issue with medical requests (the update gets sent but there's no letter followup), so it's fair so assume the system might be broken on the medical request front. See if you can get a live agent on the phone to talk to. Its dastardly how many times you have to call to get through BUT... at least this will confirm the situation for you. And put your mind at rest as to the next step. You could ask what if you did a medical without getting a request and sent it in ahead of the request? I've not heard anyone do this but there are those of us who submitted the initial app with medical attached, so it seems a fair question (EDITED LATER to say: probably not a wise thing to do - SEE BELOW)