okayy so me and my boyfriend had sex between the 16th-20th of dec. 2010 my period came 6 days late. was light and not enough to even fill up a tampon or a pad... it only lasted 3-4 days very light. i went to the gyno yesterday dr. made me pee on a stick it says neg. but is it too early to tell??? ive been having the same period cramping and feel a little nausous thats why ive been in bed all morning tired cant stay awake for nothing... could it be im too early to tell? ive never beeen late on a period before and its never been that lite its alwayssss heavy period every month... whats going on??