Could you help me sort things out? I'm 21, here's my concern. My last period started Dec 16, 2013 and it was 4 days earlier than my due, it was nothing new to me but what was unsual was it wasn't my normal flow w/c is heavy, even if it was 2 days after my period started. On the 3rd day my usual flow came but only lasted for 2 days too, and the next 2 remaining days of my period were just i think spotting. On 27th last month me and my guy did the "deed" and he ejaculated inside me but i didn't have my orgasm. We again did it last jan 03, 2014, we both had orgasm and again he ejaculated inside me. Jan 05, 2014 came, i noticed blood like discharges on my liner up until this morning. I can't tell it's my period already since i only had my last 18 days ago. Am I experiencing Implantation Bleeding? Am I pregnant? Btw, me and my bf have been practicing unprotected sex since we started making out 4 years ago. Thanks!