I had sex a day or two after my last period. I got really sick and had a fever of 104-107 for about two and a half days. I’m wondering if that didn’t delay my ovulation. But I was supposed to get my period 4 days ago and I’ve taken two tests that both show up negative. I know stress can delay a period but I’m freaking out and don’t know how to destress because I keep freaking out that it’s a false negative.