I posted a question a couple of weeks ago. I am now 3 days late and I tested negative this morning. Still mild cramping. With the ending surgery (1/26) and fertility meds (started 10/2016) I have never been late. I can always count on getting my period a day before my trackers prediction. Could there be something wrong? Am I getting false negatives? My stress is at an all time low with me being on vacation so I know that can't be it. Should I get a blood test done? Will it even show if I am?