Hey, so, I just had to strangest low BG experience. I came home and took my BG at 9:40 - 112. I made a bunch of popcorn and bolused about 10 minutes before eating it (which is usually about how long it takes to get to work for me.) Just after finishing the popcorn, I started to feel EXTREMELY low - like, I've never passed out 'cause of a low, but I felt like I was on the verge. I guzzled some OJ, and took my BG - meter said 230. I was like, there's no way. Took it again 4 minutes later - 34. Just the fact that I went low like that for no reason is bizarre, but my meter has never malfunctioned or anything. Is it possible to plummet that quickly? And now I'm recovering, but I am pouring sweat. Like, I get sweaty when I go low, but I am just dripping. Anywho, I think I'm fine, but have any of you guys ever had something like that happen?
I have but my issues are gastroparesis. I often don't get nausea and vomiting, but for the last 2 or 3 months I've had to dual wave all my boluses and do them over a 3 hour period or I just fall FAST. Have you ever had any problems with gastroparesis in the past? Did you have any insulin on board already, or were very active earlier in the day?
Did you wash your hands before you tested either time? The fact that pu got a 230 when you were obviously actually low makes me think you may have had some residue on your hands which made your meter read high even at the previous 112 test. I get false highs from dirty fingers quite often.
It is possible that you were already trending down and the bolus just accelerated the fall. That's one reason I like my cgm so much - I know which direction I'm heading before I bolus. Take care of yourself! :)
No, it appears to have just been a one off thing. I way over corrected the low, but otherwise everything’s been fine since. Who knows? 
Maybe that’s what it was… It’s as good an idea as any I’ve had. Because, yeah, there’s no way my BG was 230 - I already felt like I was going to pass out.
I’ve got a request into my doctor for a CGM, but she’s skeptical of my insurance covering it. Maybe I was trending lower. The thing that just seems so weird about it was that I went from feeling totally normal to feeling like my BG was maybe 20ish before I guzzled some OJ. I usually catch my lows around 65, but this low didn’t seem to go through that phase - it was just straight to the bottom. Ah well, everything is fine now, who knows?
How much insulin had you loaded into your body and how much exercising did you do.
Another issue - did you suddenly have the trots and do a scram of your intestines - shutting off glucose generation. That will create a fast low as well.
For me, if you beat back the insulin resistance by hard exercising, any extra insulin circulating in your system can shoot the blood glucose low fast.
Under high insulin resistance , the insulin will just be there circulating doing little.
No, all I did between checking my BG and the low was make popcorn and sit on the couch.
The other riot I have seen in digestion cycles is where the intestine has to stop and change digestive enzymes due to a conflict on foods eaten in pipeline. That means one will see an initial glucose generation for a short hour; glucose production drops to zero and then a stall of an hour then digestion takes off again making gluocse and lasting normally till digestion done.
The liver is expected to pave in hole(add glucose) in road over the stall zone till digestion takes off again.
I was eating pasta with meat sauce - tomatoe sauce and lots of cheese.
I have watched these monkeyshines on a cgms.
Good luck/best wishes.
What works for me, when in doubt as you described , I use my second meter , I carry in my kit ...and YES to the hand washing suggestion by Sam .
Whenever I have a questionable bs reading, I check it 3 times and go by the 2 that are the closest.
I'd suggest you report this low to your doctor, as evidence of unexplained lows and hypo-unawareness. That is often a criteria that drs and insurance companies base their decisions on regarding CGMS.
I would also guess that the 230 was due to OJ on your fingers.
Sam makes an important point aboutwashing hands. Anytime I handle a glucose tablet and touch it, I will get goofy elevated numbers. Any of the small size strips are affected worse by contamination.
Another note is that I have occasionally seen strips read unexplained values and I clean hands and retest. Usually the number drops nearly in half and back to more expected numbers. Are you testing on your more reliable fingers and not one that has bad habit of having some glucose backed up in it?
I now carry individual packaged wet wipes in my meter case because I have one to many times bolused too much all because of some remnant of something or other on my hands.