So I had unprotected sex the day I ovulated, he did pull out but I don’t think it was on time. At 10DPO I had light spotting and again at 11 DPO. My period is NEVER early and it is definitely NEVER light. My boobs hurt a little and I’m having lower back pain. (I get lower back pain a lot before my period but I’ve had a kidney infection which has been causing my lower back to hurt too) Not really any cramping just sharp twinges every now and then... could this be implantation bleeding? If so how light and how long did yours last?