Okay, my last period was on Sept. 15, 2009. It is now December 18, 2009 and I have missed my last 3 periods. I have gone for blood tests and urine tests for pregnancy and every single one has come back negative. I'm so confused! I mean I've been getting pregnancy symptoms like headaches, nausea, movements in my lower abdomin, I have lower back pain, ummm... Idk... I just want to know what's going on... HELP ME!