Hi,
No way to check medicals on line as far as I know, was refered last year for about 3 months, I thought I would go out of my tiny mind.
Mood swings daily; hyper each morning before I would check on DIAC page, then depression when no update. Weekends were worse!
There was also the nawing guilt that my refered medical would cause us not to get visa and I had wasted 5g's on application & dream.
Rang MOC a few times, firstly just to check they had actually received the medicals. There was a huge backlog at the time so when I realised the others refered on the same date were all processed and getting visas I rang again. The staff can not tell you the outcome but I was very politely persistent and finally got dealt with. I used to follow Medicals thread on sister site poms in oz and several others there were similarly refered for ages. They had a great spread sheet at the time, not sure about now but it might be worth a look.
I have been absolutely no solace I realise but I understand your frustrations so feel free to vent anytime & best of luck with it
Ozy