13 days late, 4 neg tests WHY IS IT SO LATE???

Hi ladies I’m 13 days late and I’ve done 4 tests and all have come negative. Can someone please tell me what could be going on?? I’ve only just gotten sore breasts and occasionally mild cramps.

Am I expecting af to come soon because she taking her sweet ass time and I’m worried. Sex was protected so I’m sure I couldn’t be pregnant ...right???