*Please* help, so confused about ovulation?

Ok, My last af was nov 25th so working it out I figured this would be my fertile week, however on sunday 6th dec i noticed a clear stretchy cm. Does this mean that was when i ovulated and missed our chance? i used the ovulation calendar to go by, but then again i do every month and still nearly a year down the line and lots of tears later still no bfp. So just wanted to know if this is still my fertile week or is that it for this month again?