How common is it for implantation bleeding to last longer than 3days? Anything online is in general and we all know real pregnancies and women dont always follow the medical guidlines realistically. Lol. Any personal experiences. I have 9days until AF should arrive and ive had sex the last three weeks with hubby lol. Brown and tiny bit of pink spotting day number 4 now. Thanks! I didnt have it with my first.