Implantation bleeding (NO PIC I PROMISE)

Crystal • Love and peace 💕✌🏼

So I was wondering. When does implantation bleeding occur IF YOU DO HAVE IMPLANTATION BLEEDING. Im on 13dpo CD40. I have sore nipples (not my boobs though) , slight cramp comes and goes , mood swings and a little nausea. Just noticed some spotting mostly when I wipe. Pinkish. What do you think?