I am a HUGE HUGE advocate of OPK's. I used them in January to help me get pregnant- sadly- as I am here- I lost the baby BUT.. you can buy them cheap online and you want to start testing around cd9 until you know more for sure when you ovulate. I knew I ovulated around cd15 but I still testing from cd9 bc it can change and I didn't want to miss it. I would also HIGHLY recommend testing 2-3 times a day when you get close to ovulation. The previous month I had only tested once a day and I know I missed it as a result and really frustrated me. One factor to be aware of too is that FMU isn't best for OPK's- it WILL still turn out positive- but only when you're really high on the LH surge and by then it could be close to being too late- that's why I recommend testing 2-3 times a day. I was testing at 7am when I woke up, 2pm, and then 8pm. I was *VERY* on top of it and I already have a stack raring to go for march once my DH and I can start TTC again. Best of luck! I am very sorry for your loss... hopefully you'll get that BFP soon!!!