Period is late by 2 days

Kylie

Okay, my period is usually 1 day late, the app isn't always right. So I usually start the day after I'm supposed to, but I haven't started yet. Me and my fiance haven't been the safest but I've taken 3 pregnancy tests and they've all came out negative. I might just be stressed out, but I'm just confused on how long I should wait before I take another one? The only symptoms I'm having is Nausea, bloating, and sore breasts.