It really is worth getting to know your body and then mc or not, you should be able to know whereabouts you are in your cycle. I can now read my CM, CP and even just those little niggles and aches and only really use OPK's to confirm what i already know.
I too am in my 1st 'cycle' after mc...had no AF yet, but I know my ERPC was 9th Dec, I started my 'cycle' about a week later, Ov'd on the 31st and will be testing in a few days, to receive my BFN, cos unless my body has thrown me totally after ERPC, I don't believe we caught this month.
I guess its the same way I subconsciously knew I had lost my baby....I was expecting them to tell me that I'd had an mmc, and it was no surprise when they did.....although it was still just as devastating.
I know you are frustrated sweetie, but you need to remember that your body will only do it when its ready....it needs to heal, physically and emotionally, and if you aren't Ov'ing yet, its cos its not ready for another pregnancy just yet. It will happen soon I'm sure xx