Yeast infection?

Madison
So I noticed, more so yesterday that my vagina is very itchy, and it's very uncomfortable, I've looked it up and it says it can be a yeast infection, my vagina isn't red but the lips are somewhat swollen. My doctors are closed, but what can I take or put on for the itching to calm down? It's very uncomfortable. 
Also if it is a yeast infection, how could I get it? I'm 26 weeks and 1 day pregnant.