I think you are worrying too much.

We see this all the times with females the last week of pregnancy, lots of ups and downs. Like I said before, low blood sugar can make the temperature drop. I know this is driving you nuts. After you have done this for years you will learn that when it happens, it happens. Most of the time now I don't bother to take the temperature but maybe twice a day if even that much. It can drive you nuts trying to figure these females out. I know it makes it hard sleeping at night.