Re: ovulation predictor test?
The OPK along with checking your CM will really help. At least so you'll know the general time you're ovulating. It's best to BD frequently when you've got EWCM. You can BBT temperature chart as well, but it's probably not worth the effort. I like the drugstore brand OPKs that come 7 to a pack. You could also try the more expensive fertility monitors that you use every day. I've heard good things about them, but never tried.
It can just take a while, so just try to stay positive.