Has this happened to anyone?

No birth control. Not actively trying. No ovulation tracking... period started saturday 22nd, average around 6 days, was a normal period. We been having a lot on intercourse but nothing yesterday, i have just been to the toilet and there was pink when i wiped, like implantation (from experience) or the start of another period. I shouldnt be ovulating till maybe sunday monday tuesday ish, so it cant be implantation, could it be another period this soon, 6 days after my last? experience or advice welcome, thank you xx