Originally Posted by
RH Clark
It could be any number of things. I would start by checking blood pressure and heart rate. You should check your blood sugar levels. If your sugar is low after consuming that much sugar, I would get tested for insulin insensitivity. Basically, you should likely consult a doctor if the condition continues.
I agree with this as a start and I would wonder if you've been over-doing it (overtraining) lately.
Disclaimer: I'm not a doctor, but I follow one on YouTube. He doesn't give medical advice over the phone/computer...