Hypoglycemia/ not diabetic

So my doctor said I am hypoglycemic. She didn't really explain much and my baby was screaming and crying my entire appointment so I didn't get a chance to ask questions. I am not diabetic but I have had a few instances where I get dizzy and nauseous. To be honest, I used to "fast" a lot so I think that might be the cause. I googled and it says that tumors can also cause it. Now I am freaking myself out even though I'm 99% sure it is from not eating considering that it is 1pm and I haven't eaten yet. Does anyone have any advice or food suggestions. I also found out that I am allergic to milk so no dairy.