In my experience I have ovulated without noticeable EWCM. In fact I can not use CM at all to help keep track of my cycle. Only way I can keep track is to temp, I have a digital basal body temp thermometer which I use every morn (previously ttc but currently as natural family planning). It is a special thermometer which has much greater accuracy to a normal thermometer. The fertility friend website is a fab way tool to help chart your cycle.

I am sorry to hear of your loss, ttc can be such a turbulent experience. I had two losses prior to DS and it was just an awful time so I really am sorry to hear about what you are going through.