I'm 13 DPO with a 13-14 day LP.(normally 13 but every once in a while it will be 14) My temp always starts dropping by now but it hasn't yet. Normally, I would be really really excited but I'm cramping like I'm gonna start and my first response test was negative this morning. Is it possible that I could be pregnant and the test just not pick it up yet? I guess I'm kinda just grasping at straws here.