I've decided to go for a low-carb plan (<50g/day). The first day was great. I ate two healthy meals–I don't eat breakfast and I don't really plan to start–and made sure to drink lots of water.
Yesterday, my second day, was much worse. I was stuck eating about 35g of carbs due to required school lunch, but I had a very protein-rich dinner and continued to drink water and sugar-free tea to make up for it. Around 6pm I started to feel incredibly nauseous and also had a very strong craving for sugar. After about an hour, when I could no longer stand the sick feeling, I ate a piece of strawberry shortcake and felt immediately better. The nausea was gone within minutes of eating.
Although I don't feel nauseous yet, I can feel a similar sick feeling rising in me again today.
tl;dr How do I stick to a low-carb plan (or any plan for that matter) when it means feeling physically ill?