I have always been hypoglycemic why am I running high blood sugar now?

I have always been hypoglycemic.Now,at 45,I am running high blood sugar. One time I will test low 60's then 260. I can't see a pattern. My blood sugar fasting will be low or as high as 170. With carbs and sugar there is no pattern. I don't know what is causing it to go up and down like this.I don't know what to eat.A high carb diet like I have all my life or no carbs,no sugar.Someone help me please!