It must be the diet pills. The diet pills on the market all make people not eat and excrete more water to lose weight. This method will rebound quickly, which will cause electrolyte and endocrine disorders in human body. Diet pills must stop. Your present state is prone, and you may have some low blood pressure and hypoglycemia. Try to keep a normal diet Now you can make a cup of salted sugar water and see if it will be better.

Get well soon ~