First time OPK questions

Sina

Hey guys

I started using the clear blue advanced digital tests on day 8 like it suggested according to my cycle . They range from 26-28 days but I didn’t open the OPK until day 7 so I started it the next day. Says I’m not fertile and I should have already ovulated according to one app and I should be ovulating on the 28th according to this app. Wouldn’t my OPK be somewhat smiley faced by now? Feeing discouraged 😕