Early pregnancy?

Wondering if anyone has experienced this… the app has been pretty accurate with when I ovulate and when I get my period but for some reason this month I didn’t get a positive ovulation test. I’m wondering if I just missed it because it happened earlier then when I started testing it maybe I just missed the surge. But today was the last day in my fertility window I guess. Starting yesterday though I had had some brown discharge and today I had an extreme aversion to what I made for dinner. Before anyone says it… I know that brown discharge is old blood and I know it’s to early to have symptoms but I’m wondering if anyone has experienced brown discharge in early pregnancy before they found out or started experiencing any symptoms early.

Thanks!