Hi, so I got my period on the 13th, but for some odd reason it was pretty different. I spotted on the 12th like just a small line of pink brown color in the am but no AF until the next day and that hardly ever happens to me. Then my period last for only 3 days and I usually have them for 5-7 days and this week, I’m experiencing nausea and cramping and sore boobs. Can I be possibly experimenting implantation bleeding?