Yep, its just five pills. The doc tells you exactly which days to take them. Mine are cd5-9, but some are 3-7 or 2-6 (like loubear in this thread). We take the pills for five days, and then you can O within 5-9 days after taking the last pill. Somehow my doc seemed confident that I would O on cd14 or so, and he turned out to be right for my last cycle, so we'll see how this cycle goes!
Ya know, I'm thinking you might be an early ovulater like I was... if you got two dark lines on your OPK on cd7, you could O a day or two later. Did you check to see if the test line got any darker today? I think you're doing everything in your power by DTD every other day anyway, so it doesn't matter too much, but if I were you, I'd still check and see which day the test line is the darkest, and then assume you O'ed sometime around the day after that or so. The only reason I bring this up is because early ovulation was the whole reason my doc put me on the Clomid. Plenty of girls get prego ovulating early, so it's not always an issue at all! But since I had been trying for 10 months, he just thought it was a possiblity that my eggs weren't maturing enough before being released OR the uterine lining wasn't given ample time to thicken before implantation. I think both of those things CAN be a problem for early ovulaters, although not always. Just something to consider. I seemed to be O'ing around cd10 before I got on the Clomid.