Best Underwear to Sleep In? Or Should I Just Not?

The Debate

I have always slept in underwear but recently read that sleeping without underwear is better for vulvar health. Now I am confused. What does everyone here do?

What I Currently Wear to Bed

Usually whatever I wore that day, which I know is not ideal. Sometimes I switch to a clean pair of cotton bikinis.

My Concerns

Hygiene: Is it actually more hygienic to go without?
Discharge: Without underwear, I worry about sheets
Comfort: I genuinely feel weird sleeping with nothing on the bottom
Period: What about period nights?

What My Doctor Said

My gynecologist said it is fine either way, but if I wear underwear to bed, it should be loose cotton to allow airflow. She specifically said to avoid synthetic fabrics at night.

Questions for the Group

Do you sleep in underwear? If so, what kind?
Has going commando at night made a noticeable difference for anyone?
Are there specific sleep underwear you would recommend (loose, cotton)?
How do you handle the discharge-on-sheets concern?

I know this is a personal thing but I want to hear what works for real people, not just what articles say.