I'm going to bombard you with questions today ? My son isn't waking up…

I'm going to bombard you with questions today ? My son isn't waking up for feedings at night, he sleeps for 5-6 hours straight... For us, sleep is expensive, we doze for 15-20 minutes during the day and walk for hours. Should I wake him up at night? The doctor said "do whatever you like. With your weight gain, you can skip one feeding. It won't be worse". But I'm not satisfied with such an answer.