26 weeks

I'm 26 weeks pregnant and in order for me to sleep I turn on my fan at low. I sleep with it on because I have really bad shortness of breath and it helps me to be able to breathe. My husband is always yelling at me saying he doesn't know why I sleep it on when it's already cold outside. Am I stupid for choosing to sleep with it on as it helps me and baby be able to breate better.