Dealing with hypoglycemia

I was diagnosed with hypoglycemic in college. It’s only managed with diet. And since then I got so used to it I haven’t had any issues (almost 10 years). Lately I’ve been getting lightheaded a lot and super nauseous! Like thinking I might be pregnant it’s been that bad. But I got my period a week ago so I’m not pregnant. I eat meals even when I’m not hungry and snack. It’s been so long since I’ve had these issues that I’m struggling on how to get on top of this again. I’m not sure what I’m doing wrong. Anyone else deal with this and have some advice? ☹️