Did i miscalculate ovulation?

Becky • ttc
Hi all, I'm new ttc and I basically charted my periods/fertility on here and another app called ovia. Seeing as I've never charted before, I have no idea how long my cycle is and choose the default average of 28 days. The calendar showed me when I was fertile and when I was supposed to ovulate and have my next period etc. I'm now 5 days late in my period. Does this mean i ovulated later? I'm not pregnant as I have no symptoms an dozens of negative tests.