Can't be sure really...seems a bit brutal for such as relatively small jump in blood sugar but it's certainly possible. To be honest, I would think that the combination of slightly elevated blood sugar, some carbs you may not be used to (though it's not so much), the cessation of anti-biotics and steroids added to the fact you are recovering from a period of ill health - is all enough to make anyone more than a bit light-headed. Had enough fluids? How long did you feel like this...and had the blood sugars then dropped ? One final little point - I would avoid steroids if at all possible...they will almost certainly spike the blood sugar, and the longer you take them the worse it will get. I am biased as steroids caused my diabetes. Hope all's well..and it was just a blip.