I don’t understand ....

mochamommy

Ok so here’s the deal, AF is on point every 28, occasionally 29 days. This month I should’ve had AF on Monday and I tested with FRE and it was negative. It’s now Thursday and I tested for the first time with those tiny strips I ordered from Amazon, I used three and all negative. My boobs have been sore for a week and a half, and I’m just confused! I never miss a period unless I’m pregnant (I have two kiddos) any thoughts about what I should do?