There are some people that test way more than you are doing Jena.
Where you are missing testing, is in the nighttime cycle. Many cats drop lower at night, as they are more active and burning up more energy with their activity.
So, do you think you could get a consistent "before bed" test every night? If you are not away at work that is.
Some people even set an alarm now and then, to test later in the night. It depends if you are able to get back to sleep or not, and if your cat is going lower in the cycle.
Low numbers need a bit more monitoring.