The left outer lip of my vaginal area has become swollen it has now moved to parts of my inner lip it only has been two days I noticed the swelling after I had put on a dirty pair of underwear on think it was clean I don't know if it is a yeast infection or something else. Please tell want wrong I am extremely scared

Diagnosis cannot be given on the internet. This irritation you are experiencing could be anything from a yeast infection to an allergic reaction. Please see your doctor to be properly diagnosed and treated.