Pregnancy or Yeast Infection?

Hailey

So I have noticed a very strong fishy smell coming from my vagina. I have discharge that is very thick in the lips. My older sister just had a baby. She says she had something similar when she was pregnant. Another friend said it could be pregnancy or a yeast infection. Tonight is new years, and I am at my mother in laws house. It is night. Should I try and take a test?