Acute paradoxical effect of caffeine?

Could a nutritional deficiency suddenly cause caffeine to have a paradoxical affect?

I've just started feeling this the past 2-3 weeks and am starting to suspect it is my moderate caffeine consumption (2 cups caffeinated 1 cup decaf) because it tapers off toward the end of the day and I start feeling more clear / awake and that's when caffeine would be clearing.

I used to be way worse with like 3-5 cups a day and it was still making me awake / focused and now it makes me sleepy and foggy.

Wondering if it could be a deficiency.