It sounds more like you just have low blood sugar occasionally, thats not that serious. I have had a full blown hypoglycemic episode, landed in the emergency room with a blood sugar level of 17. I took 2 IV bags of glucose to get to the 50 range and they fed me for 2 hours to get it in the 80's. I believe anything below 70 is considered borderline low, the Doc said if my wife hadn't gotten me to the ER i wouldve slipped into a coma and possibly died. A lot of guys get a little light headed when they cut the carbs down and immediately think,"oh, I'm going hypo." Trust me, if you go hypo, you won't even know. You become so confused and disoriented, you don't even know whats going on. Just up your carbs or if it were me, since you are so low on carbs anyway, just go keto. After a couple of days, that lightheadedness goes away and you feal normal, at least I do on a keto. My little hypo episode wasn't caused by insulin, but shoddy advice from a bald, synthol filled snake oil salesman with quirky names for all his supplements.