You’d think that 24 years of living with diabetes would turn anyone into a seasoned veteran of the condition, but even the most experienced people with diabetes slip up and make mistakes every now and then…

Case in point? Me, because I neglected to make sure I had a way of monitoring or checking my blood sugar when exercising…and then experiencing a scary low that I probably could have caught sooner, or maybe even avoided, if I hadn’t been so careless.

This all happened because I inserted a new Dexcom sensor just before taking off for my 3-hour self-defense class. I knew that the sensor’s warm-up period would end and that my continuous blood sugar readings would begin partway through class, so I felt fairly comfortable going without a blood sugar meter as a back-up. After all, my Dexcom sensors almost always start up without any issue, so I was trusting that this one would follow suit.

And that was my biggest mistake: trusting my technology.

When the warm-up period was complete and the class was taking a quick water break, I decided to check my Dex to see what my first blood sugar readings were. I was surprised (and instantly annoyed) to see that instead of a number, my Dexcom was displaying a request for a blood sugar calibration – just like the old G5s used to ask for upon insertion of a new sensor. I couldn’t understand why this happened, but I knew that pondering the matter wouldn’t make any difference…the only thing that would get my Dexcom running normally again was the finger stick checks, which wouldn’t be possible for me to do until I got home from the class because I was without my meter.

So I had no choice but to rely on nothing but my instincts and sensations in order to get a sense of where my blood sugar was headed for the remainder of the class.

And let me tell you, I can’t remember the last time I felt so vulnerable in terms of my diabetes. I was running on zero information, other than the fact that I typically can feel oncoming low blood sugars and that I tend to feel thirstier when my numbers are on the upswing. It was disconcerting – even more so when a little while later I started to feel shaky and dizzy, like I was starting to go low.

I knew I could either 1) treat what I thought was a low blood sugar and deal with the potential consequences (high blood sugar) when I got home, or 2) take a chance and ignore the low symptoms because I couldn’t confirm whether or not I was actually low. I hate to admit it, but I let a good 15-20 minutes pass before I decided it was better to correct what felt like a low rather than run the risk of passing out in front of the entire class. Turns out that I made the right call to treat my low: I felt much better after I ate some fruit snacks, and my blood sugar when I got home that evening was in the low 80s, indicating that I probably avoided a pretty nasty low in class.

While the whole incident could’ve been easily avoided, it did remind me that I ought to take some of the trust that I have in my technology and distribute it a little more evenly between it and my instincts. I proved to myself that in emergency situations, I don’t need a meter or a CGM to pick up on low blood sugars (though I obviously would prefer to have that equipment at my disposal at all times). Instead, I need to trust my instincts more and procrastinate less when it comes to taking an action – because if I had waited longer than those 15-20 minutes, the situation could’ve escalated and then I would’ve really been kicking myself for leaving my meter at home.

Rookie mistakes suck when they happen, but at least the silver lining is that there’s always a lesson to be learned (or reinforced) when they do.