Welcome to HCM.
All your symptoms are suggestive of malnutrition
due to the weight loss
program and low calorie diet you are having. Low energy levels suggest insufficient levels of proteins and sugars in the blood. Low calorie diet has to supplemented with enough water intake.
Sweating during exercise is normal and indicates burning of calories. But do not over stress
your body and try more stretching exercises.Vaginal discharge
if associated with itching and foul smell, then you should get tested for bacterial or fungal infection
Menstrual changes can occur sometimes during stressful conditions. If the same changes persist for more than three cycles the you have to get a gynecologic opinion on that. Otherwise, no need to worry.
I hope I have cleared your doubts.