I really do suggest you get some glucose tabs from the pharmacy or any place that sell diabetic supplies like walmart or a grocery store. they are fast acting measured carbohydrates and are only like $1 a tube. But honestly, it's gonna be hard to know it's your blood sugar without a glucometer (blood sugar tester) and you can pick them up pretty cheaply now, some store brands for $10. The strips tend to get pricey but if you can verify it's your blood sugar is dropping, you can have your doc write a prescription for them and your insurance will cover them. Again, store brands tend to be cheaper. Sometimes, hypoglycemia can be a sign of developing diabetes, sometimes not. Testing is really no big deal. I just got new strips for my machine yesterday as I have started having symptoms after starting a new medication. I won't know if it was an isolated incident until I monitor and I won't have feed back for my doc, until I test over a few days. I know she's gonna ask if I say I am feeling off, so might as well. Testing is like nothing to me now, just something I do to make sure I haven't become diabetic since I am so prone to wonky sugars.
Some things do carry similar symptoms: low blood pressure, anemia, thyroid issues, low sodium, on and on. You really won't know for sure until you check these things.
If you feel like you are in dire straights, you should be able to stop by a fire station and the EMTs can check you blood pressure and sometimes can even check you blood glucose, not to mention, get you help. Good Luck!
