I used FF w/o temping when we weren't actively TTC just to monitor cycle length and to see if I still had other signs of O'ing. Without charting temps, it will be difficult to pinpoint when you actually O. But if temping makes the process too stressful, CM and OPKs really do give you a great idea of when you are fertile. Last month was my first cycle charting temps post loss.
Re: Using FF without temping?
Mom to Teagan 4.11.07 and Cora 9.30.11
D&E @ 22w 9.30.09 CMV infection BFP 10.15.10 C/P 4w4d