No matter how I eat, my blood sugar has been fluctuating between as low as 46 and as high as 225. What's up?

I've done some of my own experimenting and no matter how I eat; lots of carbs, low carbs, no carbs, my blood sugar levels are fluctuating a lot. The other day I tried an experiment where I ate scrambled eggs with ham chunks, diced potatoes and sausage gravy mixed together for breakfast, for lunch I ate Skyline deluxe burrito and when I got home my blood sugar was still only at 97. I expected it to be off the charts. Another day, I ate scrambled eggs for breakfast and then meat and potatoes for lunch and by dinner by blood sugar was only 46. My meds have not changed so what's going on with my body? I'm under tremendous stress every day but that hasn't changed for over a year and a half so what's up with me?