I think I had a hypoglycemic shock on my way to work this morning....

During my first blood test, they told me my fasting blood sugar was high and that I should get retested. I did, and the second time it came back normal, though slightly on the higher side....
Still, I was so shocked by the possibility of diabetes that I've been strictly dieting for nearly a month. I'm slightly overweight, so I've been doing it to lose weight as well.
I cut out white rice and have been eating only oat rice, salads, and mainly chicken breast (avoiding red meat), and I've significantly reduced my portions...
While dieting, I haven't eaten any soups, spicy or salty dishes, or refined grains.
Since I was also told my kidneys aren't in great shape, I've been cutting out sodium as well.
Yesterday, I had tofu noodles for breakfast, one slice of whole wheat bread for lunch, and a salad with one slice of whole wheat bread for dinner, and I drank a bit of alcohol.
I only slept about 3 hours because of work before heading to the office, and I experienced something on the bus that I've never felt in my entire life.
Suddenly, my chest felt incredibly tight, my vision blurred until I couldn't see, and I broke out in a massive cold sweat.
Since it was my first time experiencing this, I panicked, wondering what to do—whether I should ask the bus to stop,
or if I should ask the two middle-aged women in front of me for help.
After about 3 minutes of heavy breathing and feeling the air conditioning, I started to feel a bit better.
I searched on my phone and it said it could be hypoglycemia and that I should eat candy, juice, or sugar.
The only thing I had was black gum, so I chewed three at once, and that seemed to help.
As soon as I arrived at work, I made some iced tea and rested, and I returned to normal..
Since it happened on the bus, I felt somewhat relieved knowing there were people around, but if I had been alone, it would have been terrifying....
I'm not certain if it was hypoglycemia, but I assume it was something like that, right? It was my first experience with true fear.
I'll have to make another hospital appointment..ㅜ.ㅜ I'm also planning to keep some glucose jelly on hand.