Accidental fast, flaked out after first meal?

[Runica]

I completed a 40 hour fast today. Totally unplanned, I just didn't 'fancy' anything to eat. I did manage to get through half a pint of double cream in my coffees, though, so 'fasting' may not be the most accurate of terms...

My first meal was one slice of cheese, a ridiculously small amount of salad, 5 raspberries and 2 dessert spoons of full fat Greek yoghurt.

My question is, since eating that 3 hours ago, I have had to have a lie down, I feel very lethargic and generally flaked out - is this a normal response?

 

[Guzzler]

It can be a normal response until you become fat adapted. When changing fuel types our bodys often 'complain' and would have us return to its accustomed fuel type. This unpleasant fatigue will pass quite quickly.

 

[Runica]

I sure hope so, I feel like I've just done a full Christmas dinner without the benefit of a glass of wine!