My cycle is norm 31 days AF is due on friday the 18.. This is my first month charting so i dont know my LP length.. I am at DPO10. So that would mean my LP is 12 days right? Is this too short?? At 10 DPO and LP being 12 days is it too early to test? And FF changed my forcasted AF date to the 25th.. What the heck does this all mean????? Please Help me!!!!