Difficulty to reach target calories for PCOS

I have PCOS so I’m trying to lose weight to improve insulin resistance, hair loss and weight loss. I’m 5’3” and at 163lbs. I lost about 3lbs on my first week of calorie deficit but now I’m having trouble reaching my calorie goals of 1600 calorie a day and my daily TDEE is about 2.3k calories. my nutritionist and physician gave me this plan so it’s safe!

I feel sick. I don’t feel like eating and I’m under 1000kcals a day. How do you eat more without taking so much energy?