p.s i forgot to say re nausea, have you checked to see if you have ketones? they can cause what you describe.you can buy cheap urine testing strips at pharmacy and the next time your blood sugar is very high wee on the stick! if it shows ketones you need to let your doc know, there are things you need to do to get rid of them and you should feel better,take care louise
you must have type 2? sounds like you have some insulin resistance to me. my young daughter has type 1 for 7 yrs she has some resistance too. they tried adding in an oral diabetes med on top of her insulin, that helped. exercise is good for reducing resistance and just being extra good with what you eat, go for stuff that is low G.I its a great way to help your blood sugars. good luck, louise