Angellexiesmum have you tried temping?? I can't get OPKs to work and haven't tried saliva but I'm really happy with temping. It means you get a bit late notice but at least I can pinpoint! I don't really get any other symptoms so I rely on the temping to know when to expect AF as my cycles are all over the shop!! Fertility Friend has nailed it two month in a row, it is predicting an O this weekend so we will see!!