just started (after a break with starches) - headaches/flu like symptoms?

i eat fruit/red meat/eggs/dairy/honey/maple syrup essentially. 200-300g of carbs so can't be 'keto flu'. but I feel just a bit edgy/weak, although the AM gym workouts have been pretty good. just towards the evening. 2700cal (500-700 deficit) currently

i did it in the past never had those issues. coincidence? my previous diet was very similar, but with white sugar, aspartame, suclarose and starchy veggies like rice/potatoes