Strange Blood Sugar Readings

These are my blood sugar readings for the past two and a half days. I have a continuous glucose monitor (CGM), although I do not know the sample interval. I worked from home on Monday and my blood sugar was consistently high. I do not remember eating anything that should have kept it high all day. There was a spike Tuesday morning, but I did not eat anything after dinner. I probably took an insulin shot to get the levels down to normal. Yesterday (Tuesday), I ate lunch around 1:00 pm. It was the last bit of leftovers consisting of some rice, tofu, and beef slices with onion. My blood sugar rose and fell but spiked at 5:00 pm when I got a cup of coffee from a machine at work. It did not taste sweet, but I guess I need to avoid it from now on. I did take a shot around 8:00 pm and ate some dinner but fell asleep soon after. I woke at around midnight feeling like crap, and my blood sugar had dropped to 78. It was very unclear why that is the case, so I took one glucose tablet and had a bowl of cereal and milk. My blood sugar stabilized but rose again at 7:00 am for no apparent reason. I slept the entire time without any food or drink intake. What the hell is going on!?

The CGM is nice since it gives me a continuous blood sugar readings. However, it is causing a lot of confusion as I cannot match the readings with food intake or activity. The readings do correspond with food most of the time, but there are many instances where the readings were really high or really low, and all I was doing was sleeping.

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