All day sickness

I suddenly threw up one night and thought I had food poisoning. After some trial and error and advice from people around me, I realised it was not morning sickness, but low blood sugar. I was eating three meals a day but did not have a great appetite. As a result, I had a constant headache and gastric issues which I mistook for morning sickness. I tried eating constantly to make sure I don't have low blood sugar. Also made a small thermos of warm milo, set my alarm 20min earlier to wake up and sip on it before getting out of bed and it worked. But now I am worried it is unhealthy for me to be eating so much carbs and sugar. :/