Hopefully someone else can chime in on this as well.
Are you temping orally??? If you are, you might want to try vaginally next cycle. I sleep with my mouth open which makes a big difference with my temps. There are a lot more variables with oral temps than vaginal ones.
I would say to start recording CM which should give you secondary indicator to O. And then just keep charting and see what happens. I would say if it goes on like that for a while, I would call your DR and see if there is anything they can do for you. You should record as much info aspossible on your chart and take it with you. Hopefully your temp shoots up in a few days and you O. Good luck!!!
Here's so info on CM:
http://www.fertilityfriend.com/HelpCenter/...y_signs.html#19
Good luck and welcome!!!