Help please

Paige

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Cramping, back ache and very sore breasts for 3 days, today is the 4th day im 12 dpo? Literally wiped and the tiniest bit of blood. I hope it isn't the start of AF