no smiley :-/

So what happens if you don't get a smiley??? I use two different trackers & just started using opks this month.. the clearblue opk said to start testing day 13 or something based on my cycle length (which isn't always exactly the same) i started them even 2 days sooner than it said.. The other tracker I use is Ovia & the "green days" on that calendar were a week sooner than Glow.. so I figured I still have all this window.. but now I'm starting to get worried. It's getting to the end of the peak days on Glow too but I haven't gotten a smiley :-/ I downloaded an ebook from the Americanpregnancy.org about ovulation & stuff & it says on there it could happen anytime from day 7-21... could I have just missed it? Coz day 7 for me is usually just the end of my period.. i started using the opks on day 12 or so coz that's what the clearblue chart said.. what am i gonna do if i never get a smiley???? :-/