I'm so confused.  Saturday I had what I thought was ovulation pain. It felt like a sharp, tearing sensation in my lower left pelvic area. It lasted all day Saturday off and on and a tiny bit Sunday. Then I started spotting on Tuesday, 3 days later. It was much lighter than a period and started out pink. It ended today, so lasted a total of 3 days. Has anyone experienced implantation like this?? We had sex once during my fertile period and used withdrawal so I'm not sure how likely it is to be pregnant, but I'd rather it be that than something wrong with me.