Sound like hypoglycemia to me, too. I had the same problem, even though I didn't test out as IR on the official tests. Don't drive after a big meal or lots of sugary carbs!
I'd get this checked out by a doctor and also try to use a insulin meter to check your own levels. (I found I would be borderline low when I got tired, learned I could self correct by eating a tiny bit of sugary stuff - a sip or two of orange juice- plus some protein. But if I was really out of wack, after a big meal, I would just have to "sleep it off")
I started Met and a drug for depression/mood swings and the combo totally improved my energy level. I now function on a more constant level!
Also check out narcolepsy with your doctor...it's another "marker" for genetic metabolic problems. My aunt had this (and would fall asleep driving...). Meds can help.
__________________ Age: 54, post-menopause Two daughters, ages 10 and 14, natural conception! One mc at 12 weeks Original dx: 1983 "androgen excess syndrome" Re dx: 2003 (ovaries now clear, weight under control)
had Laser Current Meds: Met, 850 2x daily Seroquel, 12.5 mg 2x daily (for depression, mood swings) Multi vit Fish oil, 500 mg 2x daily Magnesium and Calcium |