FF is driving me loopy this month. Please help! Here is my chart: https://www.fertilityfriend.com/home/371134 I had ov pain on days 10 and 11 and, as you can see ewcm days 10-13. On cd16 FF put my coverline on and said I'd OV'ed on cd13 (previous charts show I ov'ed on CDs 12, 13 or 14.) The next day it moved my ov back a day to day 14 and the next day it took it away altogether, much to my annoyance! I've never had this before. I feel sure I OV'ed and I can't believe it is yet to happen as it's so late in my cycle and the cm suggests otherwise. Can anyone make any suggestions?? It's getting me down.