Painting new apartment?

My boyfriend and I just got a little studio apartment and need to do a lot of painting. But the windows don't open :/

It's Behr premium plus Paint and primer. I'm 10 weeks. Planning on keeping a fan on but the fumes dont really have anywhere to go. Will it be a problem? Hurt my baby? 10 weeks

Edit: Unfortunately, there a places where windows are not required. Some require at least one working window, but in my state, there doesn't need to be any. The only requirement is that if they are functioning windows, they need to open, close and lock. But mine are decorative, just glass that never opened. So there's not much I can do.