Insomnia from too few calories or too few carbs?

I switched to low carb (30g) in September 2025 because I have reactive hypoglyecmia and it prevented me from having blood sugar spikes and crashes. I think I also had insulin resistance and wanted to manage that. I started exercising around the same time I switched my diet.

Everything was fine until about a month ago. I've been getting really bad insomnia for the last few weeks. I'm at about 20% body fat as a 38 y/o female (could be more, could also be less) and 110 lbs at 5'2.

I think I've only been eating 1200 calories - not intentionally, I'm just eating until I'm full. It wasn't until I put my daily meals in Cronometer that I realized I was possibly under eating. I seem to continually be getting more muscular but am not losing weight.

I've upped my electrolytes and it isn't helping at all. I'm afraid to up my carbs as it seems to trigger my reactive hypoglyecmia. Could my insomnia be related to too few calories, or is it potentially due to too low carbs as well?