do you have fungus gnats, I have realized recently that they are a big problem with some of the seedlings that don't germinate right away, because they end up getting eaten.. and also just make sure you keep the soil moist (I had forgotten about it because once a handful of the seedlings come up, I tend to let them dry out a little more, and forget that I need to keep watering the other ones that haven't come up yet and not let them dry out at all)
and beyond that, it isn't uncommon to get a full week without anything popping up, I think I just waited a week before I had another small group pop up the other day.. and I still have a couple Brain Strain Reds and Bhut yellows that need to come up and it's been just about 2 weeks I think.. if I have 1/2 of them come up within the next 2 weeks, I will be happy.. but you can't watch them day to day, I mean I check on mine all the time, but I don't expect a new one to pop up everyday.. need to go the full 7 days, and even if nothing pops up.. wait until the next full week is done, and if nothing pops up in 2 weeks.. THEN you might have a problem..(assuming your doing everything right.. which I think I remember you have everything all set).. it's just a time game
edit: and of course I could always be wrong and you do have an issue, and as long as you have the time, go for it, and check everything out, but just saying it isn't uncommon.. at all.