Your temp didn't drop below the coverline so there is still a chance that you are pregnant. Also your temp usually will drop the day you are starting your period so if you didn't start yet I wouldn't worry.
Also there is a such thing as an "implantation dip" where the temp can dip low the day of implantation and then go back up the next day.
If you do start today or tomorrow then you need to talk to your doctor because you have a luteal phase defect. If you do NOT start take a test at 18 DPO because you very well could have experienced an implantation dip.
I wouldn't worry just yet!
at 4:15 PM on Dec. 5, 2010