CD?? I can't even remember!! :)

I've been doing the opk's every day now for a couple of days, and I'm not going to lie, I feel like I've wasted money everytime I get a negative result. Wasted money using one of the tests that is, those things are A- Confusing to read and B- Freaking expensive. I bought the digital one, thinking maybe I could get refills for it..... no such luck, they dont sell them. The regular ones are hard to read because my eyes play tricks on me, and I think both lines match and ryan comes along and says they don't!! Grr..... all in the life and times of a woman TTC!! :)