Hey ladies. I'm not in CD1 in my second month ttc. First month I only used CB dual hormone OPK which picked up my peak so I did the bd a lot around that time up to and few days after peak. Got BFN and 9DPO and then AF came at midnight. Gutted. But this month I'll be using the CB fertility monitor. Anyone else used this? Stories welcome :-) (not using the advanced fertility monitor btw)