fatigue post refeed?

I just completed a 74 hour fast (YEEHAW) for my chronic illness. was it hell? yes. Did I finally reach that euphoric feeling of all my symptoms being lifted at around 70 hours? YES. Felt great and SO clear headed. I refed this morning at about 6:30 am with some soup and then a (takeaway) vegebowl with tahini cauliflour and some chicken, it was a big meal admittedly. Pretty healthy, I had an instant lethargy, I laid down for a bit and still felt empty so I had a bunch of blueberries, strawberries and some almond butter on GF bread. I've bene grazing throughout the day but just feel really fatigued. I guess it's normal? I want that 3rd day feeling back lol. I also really want to exercise again finally but feeling so dead.