Helppp😣

According to the app I’m 12 days late. Last month i was 6 days late, i had got my hopes up but then af showed up so i thought maybe it will be the same this month. But nothing yet. I haven’t tested bc im scared it will come back negative. Idk when I ovulated bc I didn’t keep track of it. I was just like if it happens it happens. Only symptoms i have are dizziness, nausea but i haven’t threw up, sore breast, and sharp cramps at times. What could it be. Ik i wasn’t stressed so it couldn’t be that but now i am begging to stress a little bit.