My vagina feels swollen and has been itching for 3 days. should i go see a doctor or is it just a yeast infection?

Sounds like yeast: Itching almost always signifies yeast. And combined with the swelling feeling too. You could treat with over the counter medication for yeast and see if that improves? Or go see a health care provider and see if they can make a diagnosis. Sometimes it helps to think about what may have been different in your life/environment that could have caused a yeast infection... In order to prevent future.