Wowser! Unfortunately, I have BT & DT! So, in the spirit of Bennet -- LYMI!
I agree with Joe, I try (emphasis on "try") to check and re-check when I get an out of whack number like that, especially if I am not feeling it.
Those super low numbers sometimes cause me to "lose" a whole day, due to feeling shaky and a bit disoriented, even after I get back in range.