Missed period

Is it possible to not get a positive pregnancy test although you’ve missed your period because you ovulated later than you thought you had? I’m 7 days late for my period and have been getting negative tests, but I’ve been having a lot of cramping in my tummy (different to period cramps) but I’m not sure if I’m just giving myself false hope with the symptoms I’ve been having I’m also never this late for a period.