Good luck, I started testing with opks yesterday, not that I think I'm going to ovulate yet but I want to see if I get a line, I've got a faint line and usually dont get a line at all, so hopefully over the next few days I'll get a positive. Mine were £3 something for 20 with free postage, so if I end up using them all up it doesn't matter...hopefully I wont get to cd 20 and still testing, but you never know with my cycles. To be fair I've actually never ovulated before cd 20 so if I do ovulate soon it will be a miracle!!!! lol