Don't pee on sticks for at least 8 more days!!! Sticks are expensive. So are thermometers. Don't pitch your thermometer yet. If you have two thermometers that show tenths (not hundredths) then you could nuke a cup of water an stick them both in - see if they match.
HW, you are so very wise. I am not. I took your suggestion and used my regular thermometer and my basal thermometer to see if they would match up. However, I used my tea as the test. My tea that I had just made from near boiling water. Needless to say, both thermometers stated "Err" which means "Holy crap! You're dead! Because you are nearly boiling!"I repeated the test with tea that was slightly not-warm to me when I drank it. They matched. Temp is still high this morning.